Write the product of 7x7x7x7 in exponential form.

If a 36 inch yardstick casts a 21 foot shadow, how tall is a building whose shadow is 168 feet? what is the scale factor

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.

Suppose m: angle a =77 degrees what is the measure of a complement of a complement of angle a, what is a conclusion you can draw about a complement of a complement of an angle