Answer:
c
Step-by-step explanation:
Step-by-step explanation:
distance between (12.-7) and (-3, -7)

=12+3
=15 units
9(x + 3) + 15x
9x + 27 + 15x ...combine like terms
24x + 27 <==
A semi circle is half a full circle. Find the area of the full circle and divide it by 2.
Area of a circle = pi x r ^2
R is half the diameter
Area of full circle:
Area = 22/7 x 21^2
Area = 1386 sq. Ft
Area of stage = 1386/2 = 693 square feet