PLEASE HELP I’ll give brainlest

Your friend uses c=50p to find the total cost, c, for the people, p, entering a local amusement park is the cost of admission proportional to the amount of people entering the amusement park? explain.

The tile along the edge of a triangular community pool needs to be replaced? ?

Find the condition that the zeros of the polynomial f(x) = x^3+3px^2+3px+r may be in a. p.