How do i do this ? factor the denominators

Given the equation f(x)=a(b)x where the initial value is 40 and the growth rate is 20% what is f(4)

Lucy and donavan measured the length of the school garden. lucys measurement is 11.3m and donavans measurement is 113 cm. could both be correct? explain

Atriangle in the coordinates of (2,3), (-4,5) and (-2,4) it is translated 3 units down. what are it’s new coordinates