Find the value of each variable. if your answer is not an integer, express it in simplest radical form.

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.

Find two numbers if their sum is 91 and the ratio is 6: 7?

Use the given information to determine the exact trigonometric value.