Answer:
15
Step-by-step explanation:
Its pretty simple, u need to learn this.
The solution is volume divided by area of circle.
Area of circle is π times radius square.
Answer:

Step-by-step explanation:
Write the terms of numerator and denominator using a common denominator.

D. Because you're multiplying 3 by a number which is what the variable represents (n), then you're just adding 7 to that which equals 19 all together. It all translates to 3n+7=19.