4/7 of marbles are blue in 4/21 of marbles are red how many times more blue marbles do you have been red

Atrail mix recipe includes granola oats and almonds there are 135 calories in a 1/= cup serving of the trail mix .how many calories are in2 cups of trail mix?

What kind of bond pays interest which is exempt from tax?

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.