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lys-0071 [83]
2 years ago
10

A tank sprung a leak in the water level started drop from 24.8 m at a rate of 2 m/h. Right and solve an equation to determine ho

w long it will take the water level to drop 8.8 m
Mathematics
1 answer:
malfutka [58]2 years ago
3 0

Answer:

8 hours.

Step-by-step explanation:

The initial water level is 24.8 meters, and the rate of water level drop is 2 meters/ hour, that means after t hours the water level L will be

L =24.8-2t

Now we want water level to be 8.8 meters, I.e L=8.8m, therefore, we have:

L=8.8=24.8-2t

we solve the equation for t:

8.8=24.8-2t\\8.8+2t=24.8\\2t=24.8-8.8\\2t=16\\\\\boxed{t=8}

it will take 8 hours for the water level to drop to 8.8 meters.

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The area of a rectangular field is 2275 m2. The field is enclosed by 200 m of fence. What are the dimensions of the field?
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perimiter=200 m
it is a rectangle to
p=legnth+legnth+width+width or
p=l+l+w+w or
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p=2(l+w)
so
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subtract w
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distribute
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add (w^2-100w) to both sides
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find what 2 numbers add up to -100 and multiply to get 2275
guess (or factor 2275 and find factors that add up to -100)
figure out that they are -65 and -35
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solve for w
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