Sorry my brain is fried... Help me?

sorry im stupid and im tired...

its 1:12 am and im doing a test this is the last two i have left please help me.

Cos^2x+cos^2(120°+x)+cos^2(120°-x)i need this asap. pls me

In 2000, for a certain region, 27.1% of incoming college freshman characterized their political views as liberal, 23.1% as moderate, and 49.8% as conservative. for this year, a random sample of 400 incoming college freshman yielded the frequency distribution for political views shown below. a. determine the mode of the data. b. decide whether it would be appropriate to use either the mean or the median as a measure of center. explain your answer. political view frequency liberal 118 moderate 98 conservative 184 a. choose the correct answer below. select all that apply. a. the mode is moderate. b. the mode is liberal. c. the mode is conservative. d. there is no mode.

What is the surface area of a cube with the volume of 729 ft?