Multiply 65 by .4 and subtract that number from 65<span />
The equation of a circle in standard form is

where (h, k) is the center of the circle, and r is the radius if the circle.
We need to find the radius and center of the circle.
We are given a diameter, so to find the center, we need the midpoint of the diameter.
M = ((-6 + 6)/2, (6 + (-2))/2) = (0, 2)
The center is (0, 2).
To find the radius, we find the length of the given diameter and divided by 2.





You can take out 2x^3 from both terms making it
2x^3 (15+8x^2)
Answer is B
divide them
17.16/0.624 = 27.5
27.5 is the answer
double check by multiplying 27.5 by 62.4%
27.5*.624 = 17.16