Simplify 7 + (−3) pls help its due today afternoon

S-7< 3 i need answering this problem someone asap answer

Acircular city park has a sidewalk directly through the middle that is 111 - feet long. if each bag of fertilizer covers 50 square feet, then determine how many bags of fertilizers the parks and recreation department needs to use to cover the circular park. ignore all the sidewalks around and through the park.

The formula for the volume of a right square pyramid is given below, where a is the side length of the base and h is the height.