18 degrees F because
it dropped 12 degrees=10 hours
x degrees=15 hours
x is what you want to find out which is how many degrees it would drop in 15 hours.
12x15 then divided by 10 is 18.
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Answer: c
Step-by-step explanation:
R= 18
d=r(2)
36=r(2)
36/2=r(2)/2
18=r
