Which is equivalent to square root 450b^9 after it has been simplified completely

Determine the number of girls in a math class with 87 boys if there are 25 girls for every 75 boys

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).

Who long does it take to drive 150 miles at 45 miles per hour