The angle is less than 180 degrees, but more than 90 degrees. acute angle obtuse angle triangle right angle

The value √10 and √15 are plotted on the number line

Icould really use some with this question.

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.