Answer:
There needs to be more information. We at least need to know what one of the side measurements for each triangle are. Only then can we give you the answer.
Step-by-step explanation:
Length L is a function of the number of days: the more days the crew works the more mileage they will achieve:
L=f(D) =4D+200
So the DOMAIN is D & the RANGE is L
You would multiply 12/2=6$ 6*3=18$ for 3 magazines