PLZ HELP THIS IS DUE TODAY

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.

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.

The holiday party will cost $160 if 8 people attend.if there are 40 people who attend the party, how much will the holiday party cost