The length of the sides of a square are initially 0 cm and increase at a constant rate of 7 cm per second.
A. Write a formula that expresses the side length of the square, s(in cm), in terms of the number of seconds t, since the square's side lengths began growing.
B. Write a formula that expresses the area of the square, A(in cm2), in terms of the square's side length s, (in cm).
C. Write a formula that expresses the area of the square, A(in cm2), in terms of the number of seconds t, since the square started growing.
D. Suppose the function f determines the area of the square (in cm2) given a number of seconds t, since the square started growing. Write a function formula for f.