How can i evaluate the expression 8^2/3

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

What is the approximate value of  q  in the equation below? –1.613–1.5220.5853.079

Given abc find the values of x and y. in your final answer, include all of your calculations.