I will help you my teacher help ed me what page is it
<span>By the Pythagorean theorem:
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![x= \sqrt{7^2+6^2}= \sqrt{49+36}= \sqrt{85} \approx 9.22 \ \text{ft}](https://tex.z-dn.net/?f=x%3D%20%5Csqrt%7B7%5E2%2B6%5E2%7D%3D%20%5Csqrt%7B49%2B36%7D%3D%20%5Csqrt%7B85%7D%20%20%20%5Capprox%209.22%20%5C%20%5Ctext%7Bft%7D)
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Nevermind my question above, it was stupid.
The perimeter is 100 ft. because there are 4 sides and two are 20 feet long and the other 2 are 40 feet long (40, because the length is twice as long as the width, which is 20), and <span>20+20+40+40=100.</span>
I believe c should be the answer. I apologize if its wrong