Find the sum of the GP 8/10, 8/100, 8/1000 n terms​

Look at the following graph of the given equation. determine whether the equation is a function. explain why or why not.

Aheated piece of metal cools according to the function c(x) = (.5)x ? 7, where x is measured in hours. a device is added that aids in cooling according to the function h(x) = ? x ? 2. what will be the temperature of the metal after two hours?

Use composition to determine if (x) or h(x) is the inverse of f(x) for the limited domain x2-1.