Rectangle

How do I go about finding the area of triangle ACE in the following: In rectangle ABDF the following is given: AB=24 BC=7 AF=16 E is the midpoint of FD

How do I find the following about this rectangular board?

On a 12 by 20 rectangular board, three plane figures are drawn: a square 6 on a side , a circle with radius 4 and an equilateral triangle that is 8 on a side. If a dart is thrown that does hit the large rectangle what is the probabillity that it hits inside on eof the three plane figures? (Landing on the side of a figure counts as being in the figure) Leave as a percent.

cylinder problem

A cylinder is inscribed in a cube. That cylinder has a sphere inscribed inside of it. What is the ratio of the volume of the sphere to the volume of the cube? HINT: Let X be a side of a square on the cube. How do I go about solving this?

Sphere whose surface area is numericaly equal to it's volume

What is the lenght of the radius of a sphere whose surface area is numerically equal to it's volume?

radius of a sphere is increase what % is volume increased

If the radius of a sphere is increased by 20% then the surface area is increased by 44%. By what percent exactly is the volume increased?