Answer:
6. D
Step-by-step explanation:
V= 1/3 pi r^2h
Find the radius
r=d/2
r=8/2
r= 4
V= 1/3 pi (4)^2•6
V=32pi or 100.53
Answer:
The increase to the nearest percent is 14%
Step-by-step explanation:
The percent of increase is the weight change over the original amount
.14285714285 To change a decimal to a percent, move the decimal two places to the right.
Rounded to the nearest percent is
14%
As given,
Step 1: Pick any three-digit counting number
Lets pick the number 643
Step 2: Reverse the digits of the original number.
So, reverse becomes 346
Now, it says that the difference of these two numbers has a tens digit of 9.
Lets, check:

So, its true that the difference has a tens digit of 9.
Another example:
Lets take 449
So reverse is = 944
Difference = 
Here also the tens digit is 9.
So, the condition applies to all 3 digit numbers.