A projector displays an image on a wall. The area (in square feet) of the projection is represented by x^2-8x+15

In the given figure ar(adf) =ar(cda) and ar(cdf) = ar(cdf). show that abdc and cdfe are trapeziums.

What is the number 321,000,000 in scientific notation? also what is the number? ?

Mikes car gets an average of 28 mpg. there are 12 gallons of fuel in mikes car when he starts his trip of 140 miles. about how many gallons are left at the end of his trip?