SAT Right triangles Question

For a certain type of rope, the equation $y=900a{x}^2$ , where $a$ is a constant, gives the estimated breaking strength $y$ , in pounds, of a rope with a circumference of $x$ inches. Based on this equation, if a rope of this type has a circumference of 2.75 inches, it has an estimated breaking strength of 9,528.75 pounds. What is the estimated breaking strength, in pounds, of a rope of this type that has a circumference of 7.50 inches? The function $h$ is defined by $h(x)=(x+p)(x-2)(2x-12)$ , where $p$ is a constant. In the $xy$ -plane, the graph of $y=h(x)$ passes through the point (-3, 0). What is the value of $h(0)$ ?