I would do 1/2 base* height pi and the cross out pi and divide 120 by 12
and your answer is :10...im not for sure but hopefully it helped.
Answer:

Step-by-step explanation:
Let assume that boiling point of water diminish linearly with the increase on altitude. Then, the expression needed is this first order polynomial:

The boiling point of water at a height of 8.85 km is:

Answer:
k=20
Step-by-step explanation:
The constant of proportionality, k, measures the constant value of the ratio between two proportional quantities, being y and x in this case. Essentially, y/x will always equal 20, the constant of proportionality.