Two shapes with equal perimeter are pictured below. What is the measure, in units, of CD?
A-2
B-17
C-12
D-9

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?

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

Ineed i been stuck on this question since yesterday