Can someone pleassse help me

Which expression allows you to determine the mechanical advantage of an inclined plane? a. height of plane / input force b. length of plane / input force c. length of plane / height of plane d. height of plane / length of plane

The slope of a velocity time graph over any interval of time gives the during that interval

When a light bulb shines, it gives off light energy and energy. a. heat b. potential c. chemical d. electrical