A Is your answer :D
W^2 + 2W + 3
Answer:
314 square feet
Step-by-step explanation:
we know that
The area that will be covered by the spray of the quarter-circle sprinkler head, is equal to the area of a quarter circle with radius of 20 feet
so
The area of a quarter circle is
we have
substitute
-1<9+n<17
-1-9<n<17-9
-10<n<8