Sarah is driving. Her distance in km from Tempe after t hours of driving is given by
Question:
Sarah is driving. Her distance in km from Tempe after t hours of driving is given by x = D(t) = 13 + 57t.
a. Determine a formula in terms of x for t = D -1 (x).
b. Compute D -1 (70).
c. In the expression D -1 (x):
What quantity (distance or time) does the x represent?
What quantity (distance or time) does the entire D -1 (x) represent?
d. Which of the following statements best describes D -1 (x) ?
(1) The ratio of Sarah's distance from Tempe (in km) to x hours of driving.
(2) The reciprocal of Sarah's distance from Tempe (in km) after x hours of driving.
(3) The number of hours of driving needed for Sarah to be x km from Tempe.
(4) Sarah's distance in km from Tempe after x hours of driving.
Vector Mechanics for Engineers Statics and Dynamics
ISBN: 978-0073212227
8th Edition
Authors: Ferdinand Beer, E. Russell Johnston, Jr., Elliot Eisenberg, William Clausen, David Mazurek, Phillip Cornwell