PLEASE HELP THIS IS FOR 100 POINTSS

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

Write an inequality and solve each problem.for exercises 11 and 12, interpret the solution.

Aproduction manager test 10 toothbrushes and finds that their mean lifetime is 450 hours. she then design sales package of this type of toothbrush. it states that the customers can expect the toothbrush to last approximately 460 hours. this is an example of what phase of inferential statistics