Help i don’t know the answer

The graph of h(x)= |x-10| +6 is shown. on which interval is this graph increasing

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.

Bring the fraction a/a-4 to a denominator of 16-a^2