Math please help urgent :((( brainliest!

The surface area of the triangular prism is .

What is the volume of the cone to the nearest cubic millimeter? (use π  = 3.14) a) 46 mm3 b) 128 mm3 c) 183 mm3 d) 275 mm3 diameter = 5 mm height = 7 mm how do you do this problem step by step?

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.