A b or c ? Help please

5/6+7/8what is the answer sealsdbdbshd

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers

Find the volume of the wedge cut from the first octant by the cylinder z=12-3y^2 and the plane x+y=2.