Hi..I'm new here..Can some one help mi with my school work plz​

Iwill give 30 points to whoever answers ! what is the formula for actual mechanical advantage and ideal mechanical advantage?

Find the dimensions and area of the largest rectangle that can be inscribed in the upper half of the ellipse. (give your answers in terms of a and b. enter the dimensions as a comma-separated list.)

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration