Determine for each number weather it is a rational number or irrational number Plz help with this

Write the equation for the parabola that has x− intercepts (−2,0) and (4,0) and y− intercept (0,4).

Which equation can be used to measure the density of water in a spherical water tank? let w represent the number of water particles within the region.

Binh says the point of intersections is (0,-3) which statements identify the errors binh made , check all that apply