How many times larger is 9 x 10-8 than 3 x 10-12?

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.

What is the best approximation for the area of a circle with a radius of 4 m ? use 3.14 to approximate pi

What else equals 42 and 30 for multiply