Need help on question 16 ASAP and the work

An is a number that is written without a component. it is a number that is either or . an exponent is a or a number that another number is being to. the number that is being raised to a is called the . the or power tells you how many times to the base by . if an exponent is fractional then ask yourself the question: what when multiplied by itself a certain number of times will equal the number?

Find two numbers if their ratio is 4: 7 and their difference is 123.

By what fraction name for 1 must 2/3 be multiplied to form a fraction with a denominator of 15