(b) work out the value of (2.52 x 10") = (4 * 10-3)
give your answer in standard form.

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?

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.

Adesigner charges a one time fee of $200 plus $40 an hour for each project. write an expression to represent how much money the designer will make for a project