If F = x^2y/z^3 and x = 3, y = 5 and z = -2, then F = (picture incoluded)

Driving 75 mph, it takes alicia 2 hours to reach the airport to go on a vacation. it then takes her 4 hours to get to her destination with the jet traveling at a speed of 400 mph. how many miles does alicia travel to get to her destination?

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?

45% of the trees in a park are apple trees. there are 27 apple trees in the park. how many trees are in the park in all?