Answer:
Radius of sphere is 3 units.
Step-by-step explanation:
Volume of sphere is given by ![4/3 \pi r^3](https://tex.z-dn.net/?f=4%2F3%20%5Cpi%20r%5E3)
surface area of sphere is given by ![4 \pi r^2](https://tex.z-dn.net/?f=4%20%5Cpi%20r%5E2)
where r is the radius of the sphere.
Given that
The number of cubic units in the volume of a sphere is equal to the number of square units in the surface area of the sphere.
we equate formula of Volume of sphere and surface area of sphere
assuming r as the radius.
thus,
![4/3 \pi r^3 = 4 \pi r^2\\\\4/3 \pi r^3/ 4 \pi r^2 = 1\\=>r/3 = 1\\=> r = 3](https://tex.z-dn.net/?f=4%2F3%20%5Cpi%20r%5E3%20%3D%204%20%5Cpi%20r%5E2%5C%5C%5C%5C4%2F3%20%5Cpi%20r%5E3%2F%204%20%5Cpi%20r%5E2%20%3D%201%5C%5C%3D%3Er%2F3%20%3D%201%5C%5C%3D%3E%20r%20%3D%203)
Thus, radius of sphere is 3 units.
Answer: 72.8
Step-by-step explanation:
If you were to fold the lines together, the lengths would have a barely different length so it is 72.8
Answer:
.
Step-by-step explanation:
We have been given that the graph of a proportional relationship contains the point 8 and 4.
Since we know that a proportional equation is in form:
, where k is constant of proportionality.
Let us substitute x=8 and y=4 in proportional equation to find constant of proportionality for our equation.
![4=k*8](https://tex.z-dn.net/?f=4%3Dk%2A8)
Upon dividing both sides of equation by 8 we will get,
![\frac{4}{8}=\frac{k*8}{8}](https://tex.z-dn.net/?f=%5Cfrac%7B4%7D%7B8%7D%3D%5Cfrac%7Bk%2A8%7D%7B8%7D)
![\frac{4}{8}=k](https://tex.z-dn.net/?f=%5Cfrac%7B4%7D%7B8%7D%3Dk)
![\frac{1}{2}=k](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7B2%7D%3Dk)
Let us substitute k=1/2 in proportional equation.
![y=\frac{1}{2}x](https://tex.z-dn.net/?f=y%3D%5Cfrac%7B1%7D%7B2%7Dx)
Therefore, our desired equation will be
.
Answer:
Both A and B are right so the answer is C.
Step-by-step explanation:
Every X has its own Y.
Answer:
148
Step-by-step explanation: