Answer:
18.6
Step-by-step explanation:
You have to distribute the minus sign to the second parenthesis, changing the sign of every term:

The formula to find the surface area of a circle is: pi x radius², so if we square the radius the answer would be 25, then we multiply that by 3.14 and the answer would be around 78.5, so the answer is 78.5.
It means multiply if your looking in a math problem
About 175 ninth grade boys. 2/25 is equal to 0.08. if we take the 14 students and divide it by 0.08, we can get the total of 175 ninth grade boys.