9 because cause you have to plug in the numbers
![\bf c^2=a^2+b^2\qquad \begin{cases} c=hypotenuse\\ a=adjacent\ side\\ b=opposite\ side\\ -------------\\ \textit{since they're equal}\\ \textit{let's call them "u"}\\ a=u\qquad since\qquad a=b\\ b=u\\ --------\\ c=850 \end{cases} \\ \quad \\ 850^2=u^2+u^2\implies 850^2=2u^2\implies \cfrac{850^2}{2}=u^2 \\ \quad \\ \sqrt{\cfrac{850^2}{2}}=u\implies \begin{cases} \sqrt{\cfrac{850^2}{2}}=a\\\\ \sqrt{\cfrac{850^2}{2}}=b \end{cases}](https://tex.z-dn.net/?f=%5Cbf%20c%5E2%3Da%5E2%2Bb%5E2%5Cqquad%20%0A%5Cbegin%7Bcases%7D%0Ac%3Dhypotenuse%5C%5C%0Aa%3Dadjacent%5C%20side%5C%5C%0Ab%3Dopposite%5C%20side%5C%5C%0A-------------%5C%5C%0A%5Ctextit%7Bsince%20they%27re%20equal%7D%5C%5C%0A%5Ctextit%7Blet%27s%20call%20them%20%22u%22%7D%5C%5C%0Aa%3Du%5Cqquad%20since%5Cqquad%20a%3Db%5C%5C%0Ab%3Du%5C%5C%0A--------%5C%5C%0A%0Ac%3D850%0A%5Cend%7Bcases%7D%0A%5C%5C%20%5Cquad%20%5C%5C%0A850%5E2%3Du%5E2%2Bu%5E2%5Cimplies%20850%5E2%3D2u%5E2%5Cimplies%20%5Ccfrac%7B850%5E2%7D%7B2%7D%3Du%5E2%0A%5C%5C%20%5Cquad%20%5C%5C%0A%5Csqrt%7B%5Ccfrac%7B850%5E2%7D%7B2%7D%7D%3Du%5Cimplies%20%0A%5Cbegin%7Bcases%7D%0A%5Csqrt%7B%5Ccfrac%7B850%5E2%7D%7B2%7D%7D%3Da%5C%5C%5C%5C%0A%5Csqrt%7B%5Ccfrac%7B850%5E2%7D%7B2%7D%7D%3Db%0A%5Cend%7Bcases%7D)
now, for 13c
how much square feet will be covered? square feet means, Area,
namely, what is the area of that triangle?
well, now you know what sides "a" and "b" are,
area of a triangle is 1/2 b * h
Answer: Choice A
Step-by-step explanation:
Answer:
The answer is less than one
Step-by-step explanation:
Because 1/2= less than 3
1 1/2= 3 and is less than 9
2 1/2= 5 not 15