You are going to wash a large glass window
in the shape of a trapezoid. The lengths of
the bases of the window are 10 feet and 14
feet. The height is 8 feet. You can wash 6
square feet of the window in 1 minute. How
long will it take you to wash the entire
window?

192ft

Step-by-step explanation:

A: h(b1 + b2)

the answer

b. they are parallel and will never intersect.

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this