Title: AP® Calculus AB Scoring Statistics 2018 Free-Response Questions Author: College Board Subject: AP; Advanced Placement; Keywords: 2018 AP Scoring Statistics; exam information; scoring information; score data; AP scores; AP data; ADAGeneral Notes About 2018 AP Physics Scoring Guidelines. The solutions contain the most common method of solving the free-response questions and the allocation of points for this solution. Some also contain a common alternate solution. Other methods of solution also receive appropriate credit for correct work. https://secure-media.collegeboard ...conclusion is the same as. AP. Statistics 2022 Scoring Commentary. Question 6 (continued) Sample: 6B Score: 3. The response earned the following: Part (a) - E; Part (b) - E; Part (c) - E; Part (d) - I. In part (a-i) the response provides correct values for the relative proportions, satisfying component 1.2018 AP Calculus BC Free Response Question 1 Solution [Student] You can check out this project from past years here (2017) and here (2016). Many more Williston student screencasts can be found online right here. Posted in: Calculus, Student screen recordings. 2018 answers ap calculus bc college board free response questions.A response that interprets 72.95 as a slope does not satisfy components 1 or 2. Part (b) is scored as follows: Essentially correct (E) if the response satisfies the following three components:Mike Anderson and Ovie Faruq offloaded their collection of 72 NFTs for $9.25 million this week, according to OpenSea data. Jump to Two former Barclays junk bond traders reportedly ...AP® United States Government and Politics Scoring Statistics 2018 Free-Response Questions. Question. Mean. Standard Deviation. Number of Possible Points. 2.84. 1.33. 5.8.4. 17.2. 57.2. 14.9. 2.3. The following comments on the 2018 free-response questions for AP® Seminar were written by the Chief Reader, Teresa Reed of the University of Tulsa. They give an overview of the free-response questions and Performance Tasks and how students performed on each, including typical student errors and challenges.Every year, two days after the AP Computer Science exam, College Board releases the free response questions. And every year computer science teachers around the country dig through the questions and come up with solutions of their own. I'm a bit mixed on posting these. Having solutions publicly available means that students can find working ...Download free-response questions from this year's exam and past exams along with scoring guidelines, sample responses from exam takers, and scoring distributions. If you are using assistive technology and need help accessing these PDFs in another format, contact Services for Students with Disabilities at 212-713-8333 or by email at ssd@info ...This 2018 AP® Biology Free-Response Questions AP Test Prep is suitable for 10th - 12th Grade. The average AP Biology score dropped in 2018 with the addition of more data tables and graphs. Offer additional practice free-response questions by using the questions from the 2018 AP exam covering phylogenetic trees, cell structure and function, and genetic mutations.The primary goals of this question were to assess a student's ability to (1) identify various values in regression computer output; (2) interpret the intercept of a regression line in context; (3) interpret the coefficient of determination in context; and (4) identify an outlier from a scatterplot. Sample: 1A Score: 4.2018 AP' STATISTICS FREE-RESPONSE QUESTIONS 4. The anterior cruciate ligament (ACL) is one of the ligaments that help stabilize the knee. Surgery is often ... Explain your answer. (b) Summary statistics on the recovery times from the surgery are shown in the table. Type of Standard New Sample Size 110 100 Mean Recovery Time (days) 2172018 AP ® MACROECONOMICS FREE-RESPONSE QUESTIONS MACROECONOMICS Section II Total Time—1 hour . Reading Period— 10 minutes . Writing Period— 50 minutes . Directions: You are advised to spend the first 10 minutes reading all of the questions and planning your answers. You will then have 50 minutes to answer all three of the following ...1. A student performs an experiment to determine the value of the enthalpy change, DH, for the. oxidation-reduction reaction represented by the balanced equation above. (a) Determine the oxidation number of Cl in NaOCl. To determine the oxidation number, we first get all other oxidation numbers which are +1 for Na (group 1), and -2 for …Welcome to the most awesome AP Class EVER (or as most people just call it, AP Statistics). Let's go on a deep dive into the AP Statistics exam and take a look at how the exam is formatted and scored 💯. Section 2: The Free Response Questions (FRQ) The second and final section on the exam is the free-response questions.Section 1 consists of part (a); section 2 consists of step 1, step 2, and the test statistic in step 3 in part (b); and section 3 consists of the p-value in step 3 and step 4 in part (b). Sections 1, 2, and 3 are each scored essentially correct (E), partially correct (P), or incorrect (I). Section 1 is scored as follows:AP Statistics Practice Exams. AP Statistics Practice Exams Free Response Notes Videos Study Guides. Check out our listing of all the best AP Statistics practice exams. Each of these free online resources includes dozens of AP Stats multiple choice practice questions, and several have free response questions as well. Start your test prep right now!Download free-response questions from this year's exam and past exams along with scoring guidelines, sample responses from exam takers, and scoring distributions. If you are using assistive technology and need help accessing these PDFs in another format, contact Services for Students with Disabilities at 212-713-8333 or by email at ssd@info ...Download free-response questions from this year's exam and past exams along with scoring guidelines, sample responses from exam takers, and scoring distributions. AP Exams are regularly updated to align with best practices in college-level learning. Not all free-response questions on this page reflect the current exam, but the question types ...AP® Psychology Scoring Statistics 2018 Free-Response Questions. Question. Mean. Standard Deviation. Number of Possible Points. 3.28. 1.88.A response that interprets 72.95 as a slope does not satisfy components 1 or 2. Part (b) is scored as follows: Essentially correct (E) if the response satisfies the following three components:Need to justify that content marketing works? Discover the latest content marketing statistics. Find interesting facts, benchmark stats and metrics. Need to justify that content ma...Chapter 5 Study with Me: AP Statistics How to Study for AP Statistics (and score a 5)! How I got a 5 on the AP Statistics Exam! Type I and Type II Errors 2018 AP Statistics Free Response Question 6 AP Statistics Unit 1 2017 AP Statistics Free Response Question 6 ELEMENTARY STATISTICS AP Stats 2014 #6 FRQ Solution AP Stats Chapter 6.1 Day 2 ESPAP® Macroeconomics Scoring Statistics 2018 Free-Response Questions. Question. Mean. Standard Deviation. Number of Possible Points. 5.69. 2.45.Among its widely recognized programs are the SAT®, the PSAT/NMSQT®, the Advanced Placement Program® (AP® ), SpringBoard® and ACCUPLACER®. The College Board is committed to the principles of excellence and equity, and that. commitment is embodied in all of its programs, services, activities and concerns. 2010 The College Board.4.97 0.001. S = 200.01. R-Sq = 73.33%. R-Sq (adj) = 70.37%. (a) Identify and interpret in context the estimate of the intercept for the least-squares regression line. 2 (b) Identify and interpret in context the coefficient of determination, r . (c) One of the data points was determined to be an outlier.CALCULUS BC FREE-RESPONSE QUESTIONS. The graphs of the polar curves r = 4 and r = 3 + 2 cos. p 5p. at q = and q = . 3 3. (a) Let R be the shaded region that is inside the graph of. q are shown in the figure above. The curves intersect. r = 4 and also outside the graph of r = 3 + 2 cos q , as shown in the figure above.5 - Essays earning a score of 5 analyze the choices Albright makes to convey her message to the audience. The evidence and explanations used to develop their analysis may be uneven, inconsistent, or limited. The writing may contain lapses in diction or syntax, but it usually conveys the student's ideas. 2018 SCORING GUIDELINES.10 points. calculated value: 0.00250 mol CH 3 NH 3 Cl × 67.52 g. 1 mol. = 0.169 g. (b) For a correct description of step 1: Accept one of the following: Use the spatula, balance, and weighing paper to measure out exactly 0.169 g of CH 3 NH 3 Cl( s ) . Use the balance to weigh out the mass of solid in part (a).2018 AP. STATISTICS FREE-RESPONSE QUESTIONS. 3. Approximately 3.5 percent of all children born in a certain region are from multiple births (that is, twins, triplets, etc.). Of the children born in the region who are from multiple births, 22 percent are left-handed. Of the children born in the region who are from single births, 11 percent are ...We'll get right to the point: we're asking you to help support Khan Academy. We're a nonprofit that relies on support from people like you. If everyone reading this gives $10 monthly, Khan Academy can continue to thrive for years. Please help keep Khan Academy free, for anyone, anywhere forever. Select gift frequency. One time. Recurring. Monthly.2018. AP PHYSICS C: ELECTRICITY® AND MAGNETISM FREE-RESPONSE QUESTIONS (b) Plot the data points for the quantities indicated in part (a) on the graph below. Clearly scale and label all axes, including units if appropriate. Draw a straight line that best represents the data. (c) Using the straight line, calculate a dielectric constant for the ...20.4. The following comments on the 2018 free-response questions for AP® Computer Science A were written by the Chief Reader, John Cigas, Professor, Park University. They give an overview of each free-response question and of how students performed on the question, including typical student errors. General comments regarding the skills and ...1. Researchers studying a pack of gray wolves in North America collected data on the length x, in meters, from nose to tip of tail, and the weight , in kilograms, of the wolves. A scatterplot of weight versus length revealed. y. relationship between the two variables described as positive, linear, and strong.We'll get right to the point: we're asking you to help support Khan Academy. We're a nonprofit that relies on support from people like you. If everyone reading this gives $10 monthly, Khan Academy can continue to thrive for years. Please help keep Khan Academy free, for anyone, anywhere forever. Select gift frequency. One time. Recurring. Monthly.Possible!Solutions,!2015!AP!Statistics!exam!! 6. Tortillas. a. For all tortillas on that day, the second method will not work, because we will get a sample of 200 tortillas coming from a population with a mean of 5.9 or a sample of 200 tortillas coming from a population with a mean of 6.1. But the mean of the population appears to be at/near 6.0.Partially correct (P) if the response gives an answer of 150 in (c-i) and gives an answer of 0.42 (or equivalent) in (c-ii); OR if the response does not give an answer of 150 in (c-i) but gives an answer of 0.58 (or equivalent) with supporting work in (c-ii). Incorrect (I) if the response does not meet the criteria for E or P. Notes:Past Papers. AP Statistics past exam papers including full papers, multiple choice and free response questions. Grade boundaries are as follows: The aim behind standardised tests is to have the average on the test to be roughly 50% (which corresponds to a 3) in order to optimise the distinction between scores.This video is my attempt at the 2018 AP Statistics Free Response problem #5. AP Statistics Practice Book: https://amzn.to/2LidOCWAnother problem where we use...AP® Chemistry Scoring Statistics 2018 Free-Response Questions. Question. Mean. Standard Deviation. Number of Possible Points. 4.47.Practice AP Statistics Exam . Saturday May 12, 2018 . University of Delaware . Section II: Free Response . Name: _____ School: _____ Instructions: 1. No electronic devices except an approved calculator are permitted, including cell phones andcalculus 2018 released free response solutions ab/bc 1 ab 2 bc 2 ab/bc 3 ab/bc 4 ab5 bc 5 ab 6 bc 6. back to mr calculus ...1. The sizes, in square feet, of the 20 rooms in a student residence hall at a certain university are summarized in the following histogram. Based on the histogram, write a few sentences describing the distribution of room size in the residence hall. Summary statistics for the sizes are given in the following table. Mean.AP® Calculus AB Scoring Statistics 2018 Free-Response Questions. Question. Mean. Standard Deviation. Number of Possible Points. 2.82. 2.17.Continue your response to QUESTION 3 on this page. (b) Calculate and interpret the expected value for the number of gift cards a particular employee will receive in a 52-week year. Show your work. (c) Suppose that Agatha, an employee at the company, never receives a gift card for an entire 52-week year.These are my attempts at the 2018 AP Statistics Free Response Questions. These are not the official solutions. To see the actual questions, please visit the ...1 point is earned for correctly. nNaOCI = 5.00 mL O.SOO mol NaOCl 1000 mL N aOCl. = 0.00250 mol NaOCl. calculating the value of molrxn consistent with the limiting. I molrxn nrxn = 0.00250 mol NaOCl . 4 mol NaOCl. = 0.000625 mol,:xn. reactant in part (c). point is earned for a negative.2018 AP ® MACROECONOMICS FREE-RESPONSE QUESTIONS MACROECONOMICS Section II Total Time—1 hour . Reading Period— 10 minutes . Writing Period— 50 minutes . Directions: You are advised to spend the first 10 minutes reading all of the questions and planning your answers. You will then have 50 minutes to answer all three of the following ...AP ® STATISTICS 2018 SCORING GUIDELINES . Question 4 . Intent of Question The primary goals of this question were to assess a student’s ability to (1) determine whether a cause-and-effect conclusion can be made based on how a study was conducted and (2) set up, perform, and interpret the results of a hypothesis test, in the context of the ...Write your responses to this question only on the designated pages in the separate Free Response booklet. Write your solution to each part in the space provided for that part. 4. The graph of the differentiable function f , shown for − x , has a horizontal tangent at − £ 7 x and is = 2 linear for x. 0 £ £ 7.2018 AP ® ENVIRONMENTAL SCIENCE FREE-RESPONSE QUESTIONS ENVIRONMENTAL SCIENCE SECTION II Time—1 hour and 30 minutes . 4 Questions . Directions: Answer all four questions, which are weighted equally; the suggested time is about 22 minutes for answering each question. Write all your answers on the pages following the questions in this book. WhereDownload free-response questions from this year's exam and past exams along with scoring guidelines, sample responses from exam takers, and scoring distributions. If you are using assistive technology and need help accessing these PDFs in another format, contact Services for Students with Disabilities at 212-713-8333 or by email at ssd@info ...Download free-response questions from this year's exam and past exams along with scoring guidelines, sample responses from exam takers, and scoring distributions. If you are using assistive technology and need help accessing these PDFs in another format, contact Services for Students with Disabilities at 212-713-8333 or by email at ssd@info ...StatsMonkey. This page includes resources related to using past Free Response Questions as formative assessments in your AP Statistics classroom. FRAPPYs are more than just Free Response Questions...FRAPPYs are a process utilizing past FRQs as a means to strengthen students' conceptual understanding and communication skills.AP® European History Scoring Statistics 2018 Free-Response Questions Author: College Board Subject: AP; Advanced Placement; Keywords: 2018 AP Scoring Statistics; exam information; scoring information; score data; AP scores; AP data; ADA Created Date: 9/20/2018 11:31:14 AMThe College Board typically releases the free response questions for the AP Statistics Exam the Saturday following the exam. Starting early in the morning, we feverishly refresh the College Board website like we're trying to buy tickets for a Justin Timberlake concert. Once they are revealed, we spend Saturday afternoon writing up …Among its widely recognized programs are the SAT®, the PSAT/NMSQT®, the Advanced Placement Program® (AP® ), SpringBoard® and ACCUPLACER®. The College Board is committed to the principles of excellence and equity, and that. commitment is embodied in all of its programs, services, activities and concerns. 2010 The College Board.Scoring. This question is scored in three sections. Section 1 consists of part (a); Section 2 consists of the outlier determination in part (b); Section 3 consists of the boxplot sketch in part (b) and part (c). Each section is scored as essentially correct (E), …2018 Ap Statistics Free Response Answers ... Additional multiple-choice and free-response questions with answers are presented at the end of all 15 chapters. Detailed appendices include exam-taking advice, an AP scoring guide, a guide to basic uses of TI-83/TI-84 calculators, and more. This manual may be purchased alone or with an optional CD ...The patient who stayed for 21 days is the only outlier using method B. An outlier using method B is a value located 2 or more standard deviations above, or below, the mean. Because Mean ± 2 × SD = 7.42 ± 2(2.37), then any value that is outside of the interval (2.68,12.16) is considered an outlier.AP GEOGRAPHY 2018 SCORING GUIDELINES . Question 2 . 6 points: (2 + 2 + 2) A. Explain TWO ways gentrification may positively impact neighborhoods. 2 points . A1. Increasing property values or as pr operties are renovated they rise in value. A2. Increasing tax base; as p roperties are renovated they are reappraised for higher property tax values. A3.Part (b) is scored as follows: Essentially correct (E) if an appropriate sample size is calculated and supporting work is shown. Partially correct (P) if supporting work is shown, BUT the response includes one or both of the following errors: 0.41617 (the sample proportion) or 0.45 is used instead of 0.5.The Yuga Labs digital land sale this weekend, a mass mint of new NFTs that temporarily clogged the Ethereum blockchain, is not just making money for the company behind the new set ...2018 AP US HISTORY® FREE-RESPONSE QUESTIONS UNITED STATES HISTORY SECTION I, Part B Time—40 minutes . Directions: Answer Question 1 and Question 2. Answer either Question 3 or Question 4. Write your responses in the Section I, Part B: Short-Answer Response booklet. You must write your response to eachDownload free-response questions from this year's exam and past exams along with scoring guidelines, sample responses from exam takers, and scoring distributions. If you are using assistive technology and need help accessing these PDFs in another format, contact Services for Students with Disabilities at 212-713-8333 or by email at ssd@info ...College Board AP Statistics: Past Exams. Concise resources for the AP College Board Statistics course. Questions: Samples and Commentary: Scoring: 2023: Free Response Questions: Sample Responses Q1: ... 2018 Free Response Questions: Sample Responses Q1:11 May 2021 ... We are covering these free response questions covering the in's and out's of Confidence Intervals from the following released exams: 2018 ...AP® Physics 1 Scoring Statistics 2018 Free-Response Questions. Question. Mean. Standard Deviation. Number of Possible Points. 2.17. 1.80.AP GEOGRAPHY 2018 SCORING GUIDELINES . Question 2 . 6 points: (2 + 2 + 2) A. Explain TWO ways gentrification may positively impact neighborhoods. 2 points . A1. Increasing property values or as pr operties are renovated they rise in value. A2. Increasing tax base; as p roperties are renovated they are reappraised for higher property tax values. A3.• A response that states the null hypothesis as . H : 0. 0. µ. d. ≤. may satisfy component 3. • A response that states the name of the procedure as . t-test, or one-sample . t-test may satisfy component 1. • To satisfy component 2, the hypotheses must be stated in terms of a mean. If a symbol other than . µ . or . XAP ® STATISTICS 2018 SCORING GUIDELINES Question 6 (continued) Section 3 is scored as follows: Essentially correct (E) if the response satisfies the following four components: 1. Part (d) specifies power as the name of the probability. 2. Part (e) correctly states that the probability would be greater. 3.AP Calculus 2018 AB FRQ Solutions Louis A. Talman, Ph.D. Emeritus Professor of Mathematics Metropolitan State University of Denver May 22, 2018 1 Problem 1 1.1 Part a During the time interval 0 t 300, Z 300 0 r(t)dt= 44 Z 300 0 t 100 3 1 t 300 7 dt= 270 (1) people enter the line for the escalator. (Fortunately, the problem is calculator active ...2018 AP® CHEMISTRY FREE-RESPONSE QUESTIONS The student reads in a reference text that NO(g) and NO2(g) ... Justify your answer. GO ON TO THE NEXT PAGE. --© 2018 The College Board. Visit the College Board on the Web: www.collegeboard.org. Created Date: 10/1/2022 11:13:41 PM ...Score Distributions. Sample Responses Q1. Sample Responses Q2. Sample Responses Q3. Sample Responses Q4. Sample Responses Q5. Sample Responses Q6. Sample Responses Q7. Download free-response questions from past AP Chemistry exams, along with scoring guidelines, sample responses from exam takers, and scoring distributions.Section II: Free-Response Questions . Multiple-Choice Answer Key . Free-Response Scoring Guidelines . Scoring Worksheet . Question Descriptors and Performance Data. Note: This publication shows the page numbers that appeared in the 2017 − 18 AP Exam Instructions book and in the actual exam. This publication was not repaginated to begin with ...Section 1: Multiple Choice - 50% of your score. 40 questions in 1 hr 30 mins. Section 2: Multiple Choice and Free Response - 50% of your score. 11 multiple choice …Download free-response questions from this year's exam and past exams along with scoring guidelines, sample responses from exam takers, and scoring distributions. If you are using assistive technology and need help accessing these PDFs in another format, contact Services for Students with Disabilities at 212-713-8333 or by email at ssd@info ...AP® Statistics 2002 Scoring Guidelines Form B. The materials included in these files are intended for use by AP teachers for course and exam preparation in the classroom; permission for any other use must be sought from the Advanced Placement Program®. Teachers may reproduce them, in whole or in part, in limited quantities, for face-to-face ...90 minutes. Worth 50% of total score. Free-Response Section: 6 questions (5 free response and one investigative task) 90 minutes. Worth 50% of total score. The only major difference between the current format and the format of the 1997 exam is that the 1997 exam had 35 multiple-choice questions instead of 40.2017 Ap Statistics Free Response Answers 5 Steps to a 5: AP Statistics 2018 Duane C. Hinders 2017-08-04 Get ready to ace your AP Statistics Exam with this easy-to-follow, multi-platform study guide 5 Steps to a 5: AP Statistics introduces an easy to follow, effective 5-step study plan to help you build the skills, knowledge, and test-taking ...Use these resources to prepare for the AP Human Geography free response questions. You can review prior year questions and also get some good tips and strategies. ... FRQ from 2001 to 2018. These are the actual free response questions from the past 14 years of AP Geography exams. Also has scoring guidelines, statistics, distributions, and ...Download free-response questions from this year's exam and past exams along with scoring guidelines, sample responses from exam takers, and scoring distributions. If you are using assistive technology and need help accessing these PDFs in another format, contact Services for Students with Disabilities at 212-713-8333 or by email at ssd@info ...2018 AP ® CALCULUS AB FREE-RESPONSE QUESTIONS CALCULUS AB SECTION II, Part A Time—30 minutes . Number of questions—2 . A GRAPHING CALCULATOR IS REQUIRED FOR THESE QUESTIONS. 1. People enter a line for an escalator at a rate modeled by the function r given by ⎧ ⎪ t t. 3 7 ⎪⎪ 44 1 for 0 ££ t ⎪ ()(rt ()=⎨ 100 300− ) 300 ...Continue your response to QUESTION 3 on this page. (b) Calculate and interpret the expected value for the number of gift cards a particular employee will receive in a 52-week year. Show your work. (c) Suppose that Agatha, an employee at the company, never receives a gift card for an entire 52-week year.We'll get right to the point: we're asking you to help support Khan Academy. We're a nonprofit that relies on support from people like you. If everyone reading this gives $10 monthly, Khan Academy can continue to thrive for years. Please help keep Khan Academy free, for anyone, anywhere forever. Select gift frequency. One time. Recurring. Monthly.25.4. The following comments on the 2019 free-response questions for AP Environmental Science were written by the Chief Reader, Michele L. Goldsmith, Chair and Professor, Science Department, Southern New Hampshire University. They give an overview of each free-response question and of how students performed on the question, including typical ...Section 1 consists of part (a); section 2 consists of step 1, step 2, and the test statistic in step 3 in part (b); and section 3 consists of the p-value in step 3 and step 4 in part (b). Sections 1, 2, and 3 are each scored essentially correct (E), partially correct (P), or incorrect (I). Section 1 is scored as follows:2018 AP ® CALCULUS AB FREE-RESPONSE QUESTIONS CALCULUS AB SECTION II, Part A Time—30 minutes . Number of questions—2 . A GRAPHING CALCULATOR IS REQUIRED FOR THESE QUESTIONS. 1. People enter a line for an escalator at a rate modeled by the function r given by ⎧ ⎪ t t. 3 7 ⎪⎪ 44 1 for 0 ££ t ⎪ ()(rt ()=⎨ 100 …. Download free-response questions from this year's exam and p1 point is earned for correctly. nNaOCI = 5.00 mL O.SO This is a PDF package of the official AP Statistics 2018 Full Exam, complete with all sections including: 1. SECTION I: Multiple Choice (Part A & B) 2. SECTION II: Free Response 3. Answer Key You can obtain full PDF package of the official AP Statistics 2018 full exam here. Below is a preview of each sections SEC.Here are some fantastic resources for your AP Statistics free response test prep. Be sure to review the prior year questions as well as the tips and strategies for answering these FRQs. ... This listing is from the College Board website and shows the actual AP Stats free response questions through 2018. Includes sample questions and scoring ... 2018 SCORING GUIDELINES Question 1 Na2S20 3(aq) + 4 NaOCl(aq AP Calculus 2018 AB FRQ Solutions Louis A. Talman, Ph.D. Emeritus Professor of Mathematics Metropolitan State University of Denver May 22, 2018 1 Problem 1 1.1 Part a During the time interval 0 t 300, Z 300 0 r(t)dt= 44 Z 300 0 t 100 3 1 t 300 7 dt= 270 (1) people enter the line for the escalator. (Fortunately, the problem is calculator active ...AP Calculus 2018 BC FRQ Solutions Louis A. Talman, Ph.D. Emeritus Professor of Mathematics Metropolitan State University of Denver May 22, 2018 1 Problem 1 1.1 Part a During the time interval 0 t 300, Z 300 0 r(t)dt= 44 Z 300 0 t 100 3 1 t 300 7 dt= 270 (1) people enter the line for the escalator. (Fortunately, the problem is calculator active ... Solution to FrogSimulation, #1 from the 2018 ...
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