F(x) = sin(x^2 - 2)
find points of discontinuity, if any

Adam plans to choose a video game from the section of the store where everything is 75% off. he writes the expression d-0.75d to find the sale price of the game if the original price is d dollars. gena correctly writes another expression, 0.25d, that will also find the sale price of the game if the original price is d dollars. use the drop down menus to explain each part of adams and rena's expression

I'm confused on this could anyone me and show me what i need to do to solve it.

What effect would doubling all the dimensions of a triangular pyramid have on the volume of the pyramid? explain your reasoning.