Which Exponential function has a initial and child value of 2​

For an exponential function the y-intercept is the "initial value" (not the common ratio).

will always be 2. if that's what you need

note that

because anything to the power of zero equals 0 (mathematically it's deciding something by itself)

a triangular prism is a 3 dimensional shape composed of triangles and rectangles. it is made from two triangular bases and three rectangular sides.  

x is the total time in minutes for the free response

you are given number of questions as 15 - m and time per item as 8 minutes

to find x multiply the two givens together:

x = 8 * (15-m) = 8(15-m)