Circle O has a radius of 8. Circle P has a radius of 3. The length of the common external tangent is 12. Find the distance between the center of the two circles.

Three times the sum of a number and seven is negative thirty-six. what is the number?

1) in triangle the, what is the measure of angle t (in degrees)? 2) in triangle bat, the measure of angle b is 66∘, and the measure of angle t is 77∘.what is the measure of the exterior angle at a (in degrees)?

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.