Question 7 1 pts 1 Calculate the surface area of the object obtained by revolving the curve y: Etc: +3332 , for {1 5 a: 3 . around the v-axis. Round your answer to two decimals. Hint: The formula on page 396, for revolving around the v-axis, can also be written as d 2 S=f2mt 1+(y) dm. do: Question 8 1 pts The shaded band in the diagram is cut from a sphere of radius R. Show that the surface area of the band is 27TRh . Show your work! hQuestion 9 1 pts The integral sin a cos x da can be solved using different substitutions. Which of the following are good/reasonable substitutions? Choose all that apply. Ou = sinc Ou = cost Ju = tanc Ou = secr O u = sin a cos x