What is the volume of the cone with a height of 6 1/2 feet and a diameter of 5 feet?

The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?

41/17 as a decimal rounded to the nearest hundredth

Diane’s bank is offering 5% interest, compounded monthly. if diane invests $10,500 and wants $20,000 when she withdrawals, how long should she keep her money in for? round to the nearest tenth of a year.