Answer below as attachment. m=520
Answer:
Option D. The student did not use the correct formula to calculate the area of the segment
Step-by-step explanation:
step 1
Find the area of the isosceles triangle
Applying the law of sines
![A=\frac{1}{2}(12^{2})sin(60\°)=62.35\ ft^{2}](https://tex.z-dn.net/?f=A%3D%5Cfrac%7B1%7D%7B2%7D%2812%5E%7B2%7D%29sin%2860%5C%C2%B0%29%3D62.35%5C%20ft%5E%7B2%7D)
step 2
Find the area of the sector
The area of the sector is 1/6 of the area of the circle
so
![A=\pi r^{2}/6](https://tex.z-dn.net/?f=A%3D%5Cpi%20r%5E%7B2%7D%2F6)
substitute the value
![A=(3.14)(12)^{2}/6=75.36\ ft^{2}](https://tex.z-dn.net/?f=A%3D%283.14%29%2812%29%5E%7B2%7D%2F6%3D75.36%5C%20ft%5E%7B2%7D)
step 3
Find the area of the segment
The area of the segment is equal to the area of sector minus the area of triangle
![A=75.36\ ft^{2}-62.35\ ft^{2}=13.01\ ft^{2}](https://tex.z-dn.net/?f=A%3D75.36%5C%20ft%5E%7B2%7D-62.35%5C%20ft%5E%7B2%7D%3D13.01%5C%20ft%5E%7B2%7D)
therefore
The student did not use the correct formula to calculate the area of the segment
Answer:
+ 2 is a constant
+ 3u and 4u are like terms
+ 7v is a coefficient
+ 7v is a factor
Hope that helps!
This is an arithmetic sequence with common difference 4.3
The rule is an = an-1 + 4.3 where a1 = -22.7