What is 2 x 2 x 2 x 2 x 2 x 2 x 2 is exponet form

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.

Jenisey has $24 to spend on seven pencils. after buying them she had $10. how much did each pencil cost.?

10x − 5y + 14 = 0 whats the answer pls