MATH PEOPLE PLEASE HELP go to my profile and answer my last question. no one has answered it and i NEED the answer! it's 50 points and i will give brainliest!!! please and thank you!

At which value in the domain does f(x) =0?

1. what is the measure of ∠abc? what is the measure of ∠abd?

Monica build a remote control toy airplane for science project to test the plane she launched it from the top of a building the plane travel a horizontal distance of 50 feet before landing on the ground a quadratic function which models the height of the plane in feet relative to the ground at a horizontal distance of x feet from the building is shown