Why does 20x700=14000 please give details

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.

Which graph has figures that can undergo a similarity transformation to justify that they are similar? (obviously not the third one)

Full year - williamshow many square inches are in 60 square feet? 5 square inches72 square inches720 square inche8.640 square inches