Please help me quick. Answer choices are:

A.(1/2x, 1/2y)
B.(2/7x, 2/7y)
C.(7/2x, 7/2y)
D.(7x,7y)

Given the box plot, will the mean or the median provide a better description of the center? box plot with min at 10.5, q1 at 11.5, median at 12.5, q3 at 13.5, max at 15

What effect would doubling all the dimensions of a triangular pyramid have on the volume of the pyramid? explain your reasoning.

Identify the initial amount a and the growth factor b in the exponential function. a(x)=680*4.3^x