Find the surface area of a sphere with radius, r = 11 in. surface area = in^2 (type an exact answer in terms of pi.)

Will give brainliest series to sigma notation write the following series in sigma notation. 6+10+14+18+22+26+30 example image shown below.

Parabolas y=−2x^2 and y=2x^2 +k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.

Write the slope intercept equation for line ab.