Answer:
![A=6.33\ cm^2](https://tex.z-dn.net/?f=A%3D6.33%5C%20cm%5E2)
Step-by-step explanation:
step 1
Find the radius of the circle
we know that
The circumference of a circle is equal to
![C=2\pi r](https://tex.z-dn.net/?f=C%3D2%5Cpi%20r)
we have
![C=\frac{28}{3.14}\ cm](https://tex.z-dn.net/?f=C%3D%5Cfrac%7B28%7D%7B3.14%7D%5C%20cm)
![\pi=3.14](https://tex.z-dn.net/?f=%5Cpi%3D3.14)
substitute the values
![\frac{28}{3.14}=2(3.14)r](https://tex.z-dn.net/?f=%5Cfrac%7B28%7D%7B3.14%7D%3D2%283.14%29r)
![r=\frac{28}{19.7192}\ cm](https://tex.z-dn.net/?f=r%3D%5Cfrac%7B28%7D%7B19.7192%7D%5C%20cm)
![r=1.42\ cm](https://tex.z-dn.net/?f=r%3D1.42%5C%20cm)
step 2
Find the area of the circle
The area of the circle is equal to
![A=\pi r^{2}](https://tex.z-dn.net/?f=A%3D%5Cpi%20r%5E%7B2%7D)
substitute the values
![A=(3.14)(1.42)^{2}](https://tex.z-dn.net/?f=A%3D%283.14%29%281.42%29%5E%7B2%7D)
![A=6.33\ cm^2](https://tex.z-dn.net/?f=A%3D6.33%5C%20cm%5E2)
Answer:
3520 yards
Step-by-step explanation:
1 mile in 1 hour.
In 2 hours he will cover 2×1= 2 miles
1 mile = 1760 yards
2 miles = 3520 yards
Answer: 764
Step-by-step explanation:
Yes, (3, 2) is a solution to y = 2x - 4. (: