Algebra parabola question see picture above

Using the side-splitter theorem, daniel wrote a proportion for the segment formed by luke segment de. what is ec?

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

For a function f(x), a) if f(7) = 22 then f^-1(22) = b) f^-1(f(c)) =