How did you find the interest $8.20

What are the values of m∠abc, m∠cbf, m∠abd and m∠dbe in the given figure? explain or show your work?

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.

The median for the given set of six ordered data values is 29.5 9 12 25 __ 41 48 what is the missing value?