Chapter 1.2, Problem 98E

Travel Time You are driving on a Canadian freeway to a town that is 500 kilometers from your home. After 30 minutes, you pass a freeway exit that you know is 50 kilometers from your home. Assuming that you continue at the same constant speed, how long does the entire trip take?

Range of a Projectile The maximum range of a projectile is directly proportional to the square of its velocity. A base-ball pitcher throws a ball at 60 mi/h, with a maximum range of 242 ft. What is his maximum range if he throws the ball at 70 mi/h?

EXERCISE River flow The cross sectional area C, in square feet, of a river is given by the formula C=wd, where, w is the width of the river and d is the depth, both in feetSee Figure 5.58. The speed s of the flow, in feet per minute, is measured using a meter. The flow rate F, in cubic feet per minute, of the river is given by F=sC a Find a formula that gives F in terms of the variables w,d, and s. b Use the formula you found in part a to find the flow rate of the river that has a width of 23 feet, a depth of 2 feet, and flow speed of 24 feet per minute.