Using highway mileposts, you clock 4 min,45 s to go 5 m. If the mileposts are accurate, what's the error in your speedometer reading? (b) How much time should you take to cover each mile if your true speed is 65mi/h?

At noon, Fred is driving south on Highway 1, 50 miles north of its intersection with Highway 2. He is traveling at 40 miles per hour. At noon, Jill is driving west on Highway 2 through its intersection with Highway 1. She is traveling at 30 miles per hour. (a) When will Fred reach the intersection with Highway 2? (b) How far apart will the two cars be at that time? (c) When will the two cars be closest to each other, “as the crow flies”? (d) How far apart will they be at that time?

An engineer is testing how quickly a car accelerates from rest. The velocity V is measured in miles per hour, as a function of time t, in seconds, since the car is at rest. See the table below. What is the slope for the linear function modeling velocity as a function of time, V=,  and what would the formula be for the velocity at time 0, V(0) Time (t) Velocity (V) 2.0 28.9 2.5 35.0 3.0 41.1 3.5 47.2

If an object is shot upward with an initial velocity, v 0, in feet per second (ft/s), the velocity, v, in ft/s is given by the formula v= v0 −32t, where t is time in seconds. Find the initial velocity of an object if the velocity after 2 seconds is 28ft/s.