The height, in feet, of a launched object after t seconds can be modeled by the given function. Find the average rate of change over the interval from 1 second to 3 seconds. f(x) = -16x^2+48x+24

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