Which function results in f(2)=13? f(x)=x2+8f of x is equal to x squared plus 8

f(x)=3x2+1f of x is equal to 3 x squared plus 1

f(x)=2x3+5f of x is equal to 2 x cubed plus 5

f(x)=x2+x

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers

Simplify (1/2)4th power a. (1/16) b.(1/8) c.(1/4)

Apyramid fits exactly inside a cube. the cube and the pyramid share the same square base, and they are both exactly the same height. the volume of the cube is 66 cubic inches. what is the volume of the pyramid? explain your answer. answer asap