Option B:

Solution:
Given sound level = 120 decibel
To find the intensity of a fire alarm:

where 
Step 1: First divide the decibel level by 10.
120 ÷ 10 = 12
Step 2: Use that value in the exponent of the ratio with base 10.

Step 3: Use that power of twelve to find the intensity in Watts per square meter.


Now, do the cross multiplication,




Option B is the correct answer.
Hence
.
we need more info in order to solve this problem!
I think it’s b but don’t take my word for it
The function d(t) represents the distance traveled by the train after t hours. d(5) is the total distance traveled by the train after 5 hours, which means 6:00 pm. The d(2) is the total distance traveled by the train after two hours, 3:00 pm. The expression d(5) - d(2) represents the total distance traveled by the train from 3:00 pm to 6:00 pm or for traveling at a constant speed for 3 hours.
answer:
the candle would be gone by then (done burning)
step-by-step explanation:
ok, so the candle starts off at 4in and it'll already be gone before the first hour passes. (or at least it would be in the case that by every 30 minutes 6in is burned.)
hopefully, this is what you were looking for
good luck :)
have a great day !!