Find the volume of a cone with a base diameter of 10 cm and a height of 9 cm

Icould really use some with this question.

The expression 1.01*1.005(^t) gives the amount of money, in thousands of dollars, in carter's savings account (t) years after he opens it. what does 1.01 represent in this expression?

Segment wx is shown explain how you would construct a perpendicular bisector of wx using a compass and a straightedge