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cluponka [151]
3 years ago
7

In a parking lot, 15% of the cars are blue. There are 12 blue cars in the parking lot. How many total cars are there? How many c

ars in the parking lot are not blue?
Mathematics
1 answer:
vagabundo [1.1K]3 years ago
3 0
There are eighty cars in the parking lot and sixty eight are not blue.
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The volume of the gallon is 6000 gallon
the rate of water flow per min is f(t)=300t^2
a] amount of water that flowed in the first 7 minutes=7/60 hours will be:
f(7)=300(7/60)^2
solving the above we get
f(7)=7/12 gallons

b] The time taken for the tank to be empty will be as follows:
amount of water that will flow out for the tank to be empty will be 6000 gallons
thus,
6000=300t^2
this can be simplified to
20=t^2
t^2-20=0
solving this we get:
t=-2√5 or 2√5
the time taken for the tank to be empty will be t=2√5 hours=5.4721 hours



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