4 is less than or equal to r over 8 + 10

Sara made $253 for 11 hours of work. at the same rate how much would he make for 7 hours of work?

David leaves his house to go to school. he walks 200 meters west and 300 meters north. how far is david from his original starting point?

Anew landowner is interested in constructing a fence around the perimeter of her property. her property is 1,080√30 feet wide and 500√20 feet long. what is the perimeter of the property? (recall that the perimeter is the sum of each side of a shape or boundary). a 1,580√40 feet b. 5,320√5 feet c. 3,160√20 feet d. 10,640√5 feet