Prove that the value of the expression: 731^3−631^3 is divisible by 100

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?

In the diagram, ab is tangent to c, ab = 4 inches, and ad = 2 inches. find the radius of the circle.

What is the value of -3/4 to the 4th power? -256/81 -81/256 81/256 256/81