What is the volume of this figure? (5) Solve on paper. Check your work on Zearn. 3 in 7 in 5 in 15 in 4 in in3​

Which sum or difference identity would you use to verify that cos (180° - ∅) = -cos ∅? a. sin (α -β) = sin α cos β – cos α sin β b. cos (α -β) = cos α cos β – sin α sin β c. cos (α -β) = cos α cos β + sin α sin β d. sin (α + β) = sin α cos β + cos α sin β

Me because some of question i don’t understand

If (x-2) 2= 49, then x could be a. -9 b. -7 c.- 2 d. 5 e.9