Someone please hurry and help with number 9through 15 please

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

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

Jada has a meal in a restaurant she adds up the prices listed on the menu for everything they ordered and gets a subtotal of $42.00. after tax the total is 45.99. what percentage of the subtotal is the total?