Feng has a toy car collection. He keeps 324 of the toy cars on his wall, which is 81% of his entire collection. What is the total number of toy cars in Feng's collection?

Abird on top of a 200 ft bridge tower sees a man standing on the lower part of the bridge (which is 50 ft above the ground). the angle of depression from the bird is 26 ̊. how far is the man from the base of the bridge tower? with explanation and pictures .

You dug a hole that was 8 feet deep. after taking a short break, you dug down 3 more feet in the same hole. when finished digging, a tractor accidentally filled the hole with 4 feet of dirt. how deep is your hole now?

Which strategy is used by public health to reduce the incidence of food poisoning?