Look at each equation and possible solution. tell whether each solution is correct.
a. –3x = -30; x= -10
b. 25 – 2y= 13; y = 6
c. ? + 2 = 6; z = 16

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