Acell phone plan charges a $40 base fee. if the total cost of talking 20 minutes is $41, what is the rate of change of the cost per minute talked?

Find the average rate of change for f(x) = x2 − 3x − 10 from x = −5 to x = 10.

The tiles below are pieces of a normal ecg tracing representing a little less than two heartbeats at a resting rate of 80 bpm. arrange the tiles in their correct order. rank from first to last. do not overlap any tiles.

The figures below are made out of circles, semicircles, quarter circles, and a square. find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations).