If you want to make a drawing bigger, by what must you multiply the original number. plz i need the answer fast

Place the following steps in order to complete the square and solve the quadratic equation,

The circumference of a redwood tree trunk is 20π ft, and it is 100 ft tall. what is the approximate volume of the redwood tree trunk? 1,000π ft3 10,000π ft3 4,000π ft3 40,000π ft3

Complete this sentence with the best of choices given