Before you use the quadratic formula, you have to make sure the equation itself is a quadratic and that a and b are not 0.
Letter B would be the correct answer
Answer:
39. 29
36. 50
33. 7
30. 33
Step-by-step explanation:
39. According to the Order of Operations, in this case, Subtraction & Addition are evaluated after Division & Multiplication:

36. Evaluate everything since everything is wrapped in parentheses:

33. Evaluate everything inside of parentheses FIRST:

I am joyous to assist you anytime.
Answer: 50.24
Area of a circle is pi times r^2
The r is 1/2 the d
So 8/2 = 4
Pi times 4^2= 50.24