The volume of a cylinder is given by

Let
and 
The new volume becomes

So, the new volume is 8 times the original volume. In fact, volume scales linearly with the height and quadratically with the radius.
Answer:
3y=49
Step-by-step explanation:
yeppp I'm pretty sure
Answer:
Upstream - 2 miles per hour
Downstream - 3 miles per hour
Step-by-step explanation:
For the speed upstream, the answer would be 2 miles per hour (mph), because 6÷3=2.
For the speed downstream, the answer would be 3 miles per hour (mph), because 6÷2=3.
Both answers come in similar methods. Hope this helps you!
If you don't mind, please mark my answer brainliest!
D BECAUSE OF THE POSITIVE 2
2:3. 2+3=5. So 45 divided by 5 equals 9
9x2 ( the ratio number of country music is 2)
So there are 18 country albums in the collection