Explain how knowing the formula for the area of a parallelogram is useful for figuring out the area of a trapezoid.

5,600 x 10^3 = a) 560 b) 5,000,600 c) 5,600,000 d) 56,000

Jack has a piece of red ribbon that is two times as long as his piece of blue ribbon. he says that he can use two different equation to find out how long his piece of red ribbon is compared to his piece of blue ribbon is. is he correct? explain his reasoning

An airplane travels at an unknown elevation before it descends 3 miles to an elevation of 15 miles. find the elevation of the plane before its descen.