Polynomial test solve or simplify
1) -4a2x5(-2a8x6-9x4+2a)
2) (–7x – 5x4 + 5) – (–7x4 – 5 – 9x)

Given: circle o, cd is diameter, chord ab || cd. arc ab = 74°, find arc ca.

Solve 13 + w/7= -18 (w/7 is a fraction)

The diameter of the moon is about 3500 km. approximate the surface area of the moon using the formula for the surface area of a sphere, s = 4πr2. write your answer in scientific notation.