Answer:
its b duhhhhhhhhhh put me brianliest please pls lls
The answer to 6.98x10^2 is 698.
Answer:
5400 mi²
Step-by-step explanation:
The area is half the absolute value of the sum of the determinants of the points taken pairwise in some consistent order around the polygon. For a triangle, this sum of determinants can also be written as the determinant of a 3×3 matrix of the coordinates with the third column being 1.
... Area = (1/2)|D|
where D = ...
![\left|\begin{array}{ccc}0&-1&1\\-3&-9&1\\3&-2&1\end{array}\right|=\left|\begin{array}{cc}0&-1\\-3&-9\end{array}\right|+\left|\begin{array}{cc}-3&-9\\3&-2\end{array}\right|+\left|\begin{array}{cc}3&-2\\0&-1\end{array}\right|\\\\=-3+33-3=27](https://tex.z-dn.net/?f=%5Cleft%7C%5Cbegin%7Barray%7D%7Bccc%7D0%26-1%261%5C%5C-3%26-9%261%5C%5C3%26-2%261%5Cend%7Barray%7D%5Cright%7C%3D%5Cleft%7C%5Cbegin%7Barray%7D%7Bcc%7D0%26-1%5C%5C-3%26-9%5Cend%7Barray%7D%5Cright%7C%2B%5Cleft%7C%5Cbegin%7Barray%7D%7Bcc%7D-3%26-9%5C%5C3%26-2%5Cend%7Barray%7D%5Cright%7C%2B%5Cleft%7C%5Cbegin%7Barray%7D%7Bcc%7D3%26-2%5C%5C0%26-1%5Cend%7Barray%7D%5Cright%7C%5C%5C%5C%5C%3D-3%2B33-3%3D27)
Then the area is (in grid squares) ...
... Area = (1/2)|27| = 13.5 . . . . grid squares
Each grid square is (20 mi)² = 400 mi², so 13.5 grid squares is ...
... 13.5 × 400 mi² = 5400 mi²
Answer:
wow it's amazing and I'm confused
Answer:
A; 8.60
Step-by-step explanation:
![a^{2} +b^{2} = c^{2}](https://tex.z-dn.net/?f=a%5E%7B2%7D%20%2Bb%5E%7B2%7D%20%3D%20c%5E%7B2%7D)
![7^{2} + 5^{2} = c^{2}](https://tex.z-dn.net/?f=7%5E%7B2%7D%20%2B%205%5E%7B2%7D%20%3D%20c%5E%7B2%7D)
![49+25=c^{2}](https://tex.z-dn.net/?f=49%2B25%3Dc%5E%7B2%7D)
![74=c^{2}](https://tex.z-dn.net/?f=74%3Dc%5E%7B2%7D)
![\sqrt{74} =c](https://tex.z-dn.net/?f=%5Csqrt%7B74%7D%20%3Dc)
8.60 = c