C and D are correct because 25 > 35 so that's C.
Its also D because they are not equal.
Hope this helps :)
$64.80 50+20%+8% tax then you get 64.80
Answer:
![A=81\pi\ m^{2}](https://tex.z-dn.net/?f=A%3D81%5Cpi%5C%20m%5E%7B2%7D)
Step-by-step explanation:
Step 1
Find the radius of the circular cross section
we know that
The circumference is equal to
![C=2\pi r](https://tex.z-dn.net/?f=C%3D2%5Cpi%20r)
we have
![C=18\pi\ m](https://tex.z-dn.net/?f=C%3D18%5Cpi%5C%20m)
substitute and solve for r
![18\pi=2\pi r](https://tex.z-dn.net/?f=18%5Cpi%3D2%5Cpi%20r)
simplify
![18=2 r](https://tex.z-dn.net/?f=18%3D2%20r)
![r=9\ m](https://tex.z-dn.net/?f=r%3D9%5C%20m)
Step 2
Find the area of the circular cross section
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)
we have
![r=9\ m](https://tex.z-dn.net/?f=r%3D9%5C%20m)
substitute
![A=\pi (9)^{2}](https://tex.z-dn.net/?f=A%3D%5Cpi%20%289%29%5E%7B2%7D)
![A=81\pi\ m^{2}](https://tex.z-dn.net/?f=A%3D81%5Cpi%5C%20m%5E%7B2%7D)
Answer:
B: 2⁷-1 = 127
Step-by-step explanation:
A Mersenne prime is a prime of the form 2^n -1, where n is also a prime.
Among the answer choices, neither 90=2·3²·5 nor 15=3·5 is prime. Both 2⁷-1 = 127 and 2¹¹-1 = 2047 are of the right form, but 2047 = 23·89 is a composite number.
2⁷-1 = 127 is a Mersenne prime