What is the gcf of the numerator and denominator in the following fraction? a.7m^2n^2 b.7mn c.21m^3n^3 d. mn

The figures below are made out of circles, semicircles, quarter circles, and a square. find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations).

Norder to get a certain shade of blue paint, a mixer must have 5 parts white paint to 3 parts blue. if 4 gallons of paint must be mixed, how many gallons of white paint must be used?

Which situation is an example of an observational study?