I REALLY NEED HELP! Han has 10 cubes, every 5 inches on a side.

Find the total volume of Han’s cubes. Express your answer as an expression using an exponent.

Find the total surface area of Han’s cubes. Express your answer as an expression using an exponent.

Simplify (a/b - b/a) times (a - a^2/a+b) a - a^2/a=b is a mixed number

Colby and jaquan are growing bacteria in an experiment in a laboratory. colby starts with 50 bacteria in his culture and the number of bacteria doubles every 2 hours. jaquan starts with 80 of a different type of bacteria that doubles every 3 hours. let x equal number of days. colbys experiment follows the model: a.) y=50*2^x b.) y=50*2^8x c.) y=50*2^12x jaquans experiment follows the model: a.)80*2^x b.)80*2^8x c.)80*2^12x

If f(x)=x+7 and g(x)=1/x what is (fog)(x)