Answer:
Negative
Step-by-step explanation:
Its negative
Answer: 
Step-by-step explanation:
The formula for the lateral area of a cone
is:

Where:
is the radius of the circular base of the cone
As we know its diameter
, its radius is 
is the height of the cone

This is the lateral area of the volcano with the shape of a cone
You can just substitute the m in the first equation
like this ; 2(10 - 2n) - 7n = -18.5
C.
10.5-12 is a bigger number than 8, therefore the statement is false!