Hi! :)
It sounds like you need to multiply this fraction.

*16=6
So, Marge used 6 total inches of tape.
Hope this helps!
You get the length and you times it by the width giving you the answer
The ground, the building and the line of sight between the ground camera and the top of the building form right triangle with hypotenuse equal to 45 feet and angle adjacent to this hypotenuse and ground - 50°. The building is an opposite leg to the given angle, then you should write sine function:
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The answer to the nearest tenth of a foot is 34.5 feet
Pretty sure it would be 21x^2+16x+17y
If you get the app photomath it will help you with math problems