The Purplemath Forums

I need help on all of these problems! 1. Working alone, Colleen can paint a house in 2 h less than James. Working together, they can paint the house in 10 h. How long would it take James to paint the house by himself? 2. The Computer Club went on a field trip to a computer museum. The trip cost $240...

"Suppose you have two identical circles that overlap such that the center point of one circle is on the edge of the other circle. If the overlapping area is exactly 20000 square centimetres, what is the radius of the circles? Round to the nearest whole centimetre"