Four spheres of radius 6 cm just fit inside a cylinder. Calculate the volume inside the cylinder that is empty.
Leave your answer in terms of pi

Is the orthocenter of a triangle on the inside ?

David estimated he had about 20 fish in his pond. a year later, there were about 1.5 times as many fish. the year after that, the number of fish increased by a factor of 1.5 again. the number of fish is modeled by f(x)=20(1.5)^x. create a question you could ask that could be answered only by graphing or using a logarithm.

George is putting trim around his rectangular deck, including the gate. he will need 44 feet of trim to do the entire deck. if the deck is 13 feet long, how wide is the deck?