In triangle ABC, a = 11 in, the measure of angle b is 70 degrees, and c = 9 in.
using formula b^2 = a^2 + c^2 - 2ac (cos B)
What is b, rounded to the nearest tenth?

An initial investment of $100 is now valued at $150. the annual interest rate is 5%, compounded continuously. the equation 100e0.05t = 150 represents the situation, where t is the number of years the money has been invested. about how long has the money been invested? use your calculator and round to the nearest whole number. years