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Cumulative Exam — Cumulative exam Answers

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Suppose that the speed of a car, measured in miles per hour (mph), is monitored for a short period of time after the driver applies the brakes. The following table relates the speed of the car to the amount of time, measured in seconds (sec), elapsed from the moment that the brakes are applied. Elapsed Time (sec) 2 4 6 8 10 Speed of Car (mph) 44 29 19 9 4 The data is represented in the table graphically with elapsed time on the horizontal axis and speed on the vertical axis. What general trend does the data reflect? a. With increasing elapsed time, the speed remains the same. c. There is no apparent trend in the data. b. With increasing elapsed time, the speed decreases. d. With increasing elapsed time, the speed increases. Please select the best answer from the choices provided

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Has the marrying age of a man changed over the years? The United States Bureau of the Census takes a formal count of everyone in the U.S. every 10 years and has provided the following data that gives the median age of an American man at the time of his first marriage.Year1910192019301940195019601970198019902000Median Age25.124.624.324.322.822.823.224.726.126.8Determine the average rate of change in median age per year from 1950 to 1990. Describe what the average rate of change represents in this situation.a.The median age of a man at the time of his first marriage is decreasing at an average rate of 0.0825 years of age per year.b.The median age of a man at the time of his first marriage is increasing at an average rate of 0.0825 years of age per year.c.The median age of a man at the time of his first marriage is decreasing at an average rate of 0.825 years of age per year.d.The median age of a man at the time of his first marriage is increasing at an average rate of 0.825 years of age per year.

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Find the slope of the line. a. 4 c. b. d. Please select the best answer from the choices provided

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You want to create an ID code for students at your school using three characters. The first and second characters must be a letter of the alphabet, and the third must be a digit between 1 and 9 inclusive. Characters may be repeated. Would using a list or tree diagram be a practical way to determine how many different codes are possible? Why or why not? a. Yes, we have all the information we need b. Yes, this is one way to find the answer c. No, since there are too many choices d. No, we don’t have all the information we need Please select the best answer from the choices provided

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For the given equation, find the values of a, b, and c, determine the direction in which the parabola opens, and determine the y-intercept. Decide which table best illustrates these values for the equation: Table A a b c up or down y-intercept 0 0 7 up (0, 7) Table B a b c up or down y-intercept 7 0 0 up (0, 0) Table C a b c up or down y-intercept 7 0 0 up (0, 7) Table D a b c up or down y-intercept 0 7 0 up (0, 0) a. Table A c. Table C b. Table B d. Table D Please select the best answer from the choices provided

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