103. Speed of a Skidding Car Police use the formula s = V 30fd to estimate the speed s (in mi/h) at which a car is traveling if it skids d feet after the brakes are applied suddenly. The number f is the coefficient of friction of the road, which is a measure of the "slipperiness" of the road. The table gives some typical estimates for f. Tar Concrete Gravel Dry 1.0 0.8 0.2 Wet 0.5 0.4 0.1 (a) If a car skids 65 ft on wet concrete, how fast was it moving when the brakes were applied? (b) If a car is traveling at 50 mi/h, how far will it skid on wet tar?

103. Speed of a Skidding Car Police use the formula s = V 30fd to estimate the speed s (in mi/h) at which a car is traveling if it skids d feet after the brakes are applied suddenly. The number f is the coefficient of friction of the road, which is a measure of the "slipperiness" of the road. The table gives some typical estimates for f. Tar Concrete Gravel Dry 1.0 0.8 0.2 Wet 0.5 0.4 0.1 (a) If a car skids 65 ft on wet concrete, how fast was it moving when the brakes were applied? (b) If a car is traveling at 50 mi/h, how far will it skid on wet tar?

Algebra and Trigonometry (6th Edition)

6th Edition

ISBN:9780134463216

Author:Robert F. Blitzer

Publisher:Robert F. Blitzer

ChapterP: Prerequisites: Fundamental Concepts Of Algebra

Section: Chapter Questions

Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...

See similar textbooks

Similar questions

Help
100 The brain mass of a human fetus during a particular trimester can be accurately estimated from the circumference of the head by m(c) = and c is the circumference (in centimeters) of the head. a. Estimate the brain mass of a fetus that has a head circumference of 20 cm. b. Find the rate of change of the brain mass for a fetus that has a head circumference of 20 cm and interpret your result. a. The brain mass of a fetus that has a head circumference of 20 cm is about (Type an integer or decimal rounded to two decimal places as needed.) C3 g. 1500 c 9 where m(c) is the mass of the brain (in grams)
8:39 Find x. 1. 2. 3. 1/1
200 6. 10 Time (weeks) The graph above shows the accumulation of time, in hours, a student spent studying over a 10-week penod. The graph can be descnbed by the equation h= 1.9w, where h is the total hours spent thadymg and w is the number of weeks the student had been studying. What is the average rate of chamge, in hours per week, in the total time the student spent studying during the 10 weeks? hours per week Total Time Spent Studying 三宫

ge Slope: m ify the Mean Value Theorem by finding er. C =
A radar gun was used to record the speed of a runner during the first 5 seconds of a race (see the table). Use Simpson's Rule to estimate the distance the runner covered during those 5 seconds. t (s) v (m/s)| t (s) v (m/s) 3.0 10.54 0.5 4.68 3.5 10.68 1.0 7.37 4.0 10.77 1.5 8.87 4.5 10.82 2.0 9.74 5.0 10.82 2.5 10.25 Step 1 The distance covered by the runner can be found by the integral of the velocity function evaluated over the time interval, distance = v(t) dt. Using the table provided, we will approximate this using Simpson's Rule with At = s and n = 10 10 subintervals. Step 2 Simpson's Rule says that f(x) dx Sn, S, = AX [f(xo) + 4f(x1) + 2f(x2) + ... + 2f(x, – 2) + 4f(xXn – 1) + f(xn)]. We will use the table to find values for v(t). For example, when t = 1.5, we have v(1.5) = 8.87 8.87 m/s. Step 3 Therefore, distance = v(t) dt 1 [0 + 4(4.68) + 2(7.37) + 4(8.87) + ... + 10.82] 6 m (rounded to three decimal places). Submit Skip (you cannot come back)
redictor Coef SE Coef T P Constant 316.08 28.31 11.24 0.002 Elevation -30.732 3.511 -8.79 0.003 S = 11.8603 R-Sq = 95.6% a) The printout gives the value of the coefficient of determination r2. What is the value of r? Be sure to give the correct sign for r based on the sign of b. b) What percentage of the variation in y can be explained by the corresponding variation in x and the least-squares line? c) What percentage is unexplained?
B6