Mrs. Carter is making snack packs for her class to eat on their field trip. She estimates that she will need 28 snack packs. The day of the field trip 8 students are absent and Mrs. Carter actually only needs 20 snack packs. Calculate Mrs. Carter’s percent error.

Jack lives on a farm and has a large backyard. the area of his rectangular backyard is of a square mile. if the width of the yard is of a mile, what fraction of a mile is the length of the rectangular backyard?

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.

Before simplifying, how many terms are there in the expression 2x - 5y + 3 + x?