Fill in the blank. Quadrupling the radius of a sphere increases the surface area by a factor of
A. sixteen
B. four
C. eight
D. pi
HELP

Multiply −2x(6x^4−7x^2+x−5) express the answer in standard form. enter your answer in the box.

Astuntman jumping off a 20-m-high building is modeled by the equation h=20-5t^2, where t is the same in seconds. a high-speed camera is ready to film him between 15m and 10m above the ground. for which interval of time should the camera film him?

Which set of side lengths form a right side? a) 3ft,6ft,5ft b)50 in,48in,14in c)53m,48m,24m d)8cm,17cm,14cm