C = 2<span>πr
C = 2(3.14)(8)
C = 50.24
</span>
Answer:
9/10
Step-by-step explanation:
I hope this helps!!!
Answer:
Option B. 0.783 pounds
Step-by-step explanation:
step 1
Find the area of a a 36 inch piece of PVC pipe with an outside diameter of 0.82 inches and an inside diameter of 0.75 inches
The area of a circle is equal to
![A=\pi r^{2}](https://tex.z-dn.net/?f=A%3D%5Cpi%20r%5E%7B2%7D)
we have
![r2=0.82\ in](https://tex.z-dn.net/?f=r2%3D0.82%5C%20in)
![r1=0.75\ in](https://tex.z-dn.net/?f=r1%3D0.75%5C%20in)
assume
![\pi =3.14](https://tex.z-dn.net/?f=%5Cpi%20%3D3.14)
![A=\pi (r2^2-r1^2)](https://tex.z-dn.net/?f=A%3D%5Cpi%20%28r2%5E2-r1%5E2%29)
substitute the values
![A=(3.14)(0.82^2-0.75^2)](https://tex.z-dn.net/?f=A%3D%283.14%29%280.82%5E2-0.75%5E2%29)
![A=0.345086\ in^2](https://tex.z-dn.net/?f=A%3D0.345086%5C%20in%5E2)
step 2
Find the volume of the piece of PVC
Multiply the area by its length
![V=0.345086(36)=12.42\ in^3](https://tex.z-dn.net/?f=V%3D0.345086%2836%29%3D12.42%5C%20in%5E3)
step 3
Find the weight of the piece of PVC
Multiply the volume by its density
The density is ![0.063\frac{lb}{in^3}](https://tex.z-dn.net/?f=0.063%5Cfrac%7Blb%7D%7Bin%5E3%7D)
so
![W=12.42(0.063)=0.783\ lb](https://tex.z-dn.net/?f=W%3D12.42%280.063%29%3D0.783%5C%20lb)
I’m not sure what the answer is but you can use an app called Socratic Will help you out
Answer:
80 or 85
Step-by-step explanation:
because it can't be 90and it's smaller that and greater than 70