Can someone clearly explain how to correctly work out q3? much appreciated

Acollege is planning to construct a rectangular parking lot on land bordered on one side by a highway. the plan is to use 680 feet of fencing to fence off the other three sides. what dimensions should the lot have if the enclosed area is to be a maximum?

Describe how fraction strips can you order fractions

Evaluate the expression for the given value of the variable. 5×(h+3) for h=7