At Talladega, one of the crew chiefs discovered that in a given time interval,
Jimmie Johnson completed 21 laps, Dale Earnhardt
Jr. completed 18 laps, and Danica Patrick completed
15 laps. Suppose all three drivers begin at the same
time.

How many laps would need to be completed so
that all three drivers were at the finish line at exactly
the same time?

PLEASE HELP TERRIBLE AT WORD PROBLEMS

Does the function satisfy the hypotheses of the mean value theorem on the given interval? f(x) = 4x^2 + 3x + 4, [−1, 1] no, f is continuous on [−1, 1] but not differentiable on (−1, 1). no, f is not continuous on [−1, 1]. yes, f is continuous on [−1, 1] and differentiable on (−1, 1) since polynomials are continuous and differentiable on . there is not enough information to verify if this function satisfies the mean value theorem. yes, it does not matter if f is continuous or differentiable; every function satisfies the mean value theorem.