How are 2 dimensional figures used to solve the volume of prisms and pyramids?

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

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

Which of the functions below could have created this graph?