Find the missing angel by using an equation

What is the logarithmic function modeled by the following table? x f(x) 9 2 27 3 81 4

The area of a rectangle is 15+5y square feet. which of the following expressions could be the length of the sides of the rectangle, in feet a. 5 and 3y b. 5 and 3+y c. 5 and 5+y d. 3 and 5+3y

What are the soultion(s) to the quadratic equation 40- x^2=0