If you get a nickel for each can you recycle, how much do you get for 50 cans?

Which is a reasonable estimate of the amount of water in a small, inflatable pool used by children?

On a string instrument, the length of a string varies inversely as the frequency of its vibrations. an 11-inch string has a frequency of 400 cylces per second. find the frequency of a 10-icnch string.

Atorch and a battery cost 2.50 altogether.the torch costs 1.50 more than the battery.what fraction of the total price is the torch? give your answer in its simplest form.