Carolyn is building a pen for her dog. the perimeter of the pen is the fencing material is sold by the yard. it costs 10.99/yd. what is the total cost before taxes?

How do i do this? i don’t understand

Aman is 6 feet 3 inches tall. the top of his shadow touches a fire hydrant that is 13 feet 6 inches away. what is the angle of elevation from the base of the fire hydrant to the top of the man's head?

In trapezoid abcd, ac is a diagonal and ∠abc≅∠acd. find ac if the lengths of the bases bc and ad are 12m and 27m respectively.