To find a volume of a cylinder we use the following formula:

Plug in the values:

Take the square:

Multiply the numbers:
Answer:
the first one
Step-by-step explanation:
Answer:
275 - 11=264
Step-by-step explanation:
Divide both sides by 2
a-c=2a
minus a fromboth sides
-c=a
Answer:
25%
Step-by-step explanation:
The percent of increase can be calculated using following formula:

In your case,
- Initial amount = 12 students;
- Final amount = 15 students,
then
