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lapo4ka [179]
2 years ago
8

A chemist is mixing solutions. Solution A is 15% acid, and solution B is 30% acid. She mixes the two solutions to make 12 liters

of a new solution that is 25% acid. How many liters of each type of solution did the chemist use to make the new solution?

Mathematics
1 answer:
RoseWind [281]2 years ago
7 0

Answer:

The addition of 4 liters of 25% solution to 6 liters of 50% solution produces 10 liters of 40% solution.

Step-by-step explanation:

Hope this helps.

Super sorry if it doesn't.

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kaheart [24]
I don't think this is middle school...

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8 0
3 years ago
Brooklyn has a goal to save $8,000 to buy a new entertainment system. In order to meet that goal, she deposited $4,132.79 into a
densk [106]
To see how much interest she'll get after a quarter:

$4132.79 + ($4132.79 × 0.048) = $4331.16

After two quarters:
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You can keep going until eventually reaching $8000 then see how many quarters has passed. That's a lot of calculator work!

There's another way that uses less calculation, but more algebra. I call it the exponential formula method! There's this general formula for stuff that increases exponentially, like virus, population, and MONEY:

m= d {e}^{tc}

M is money, d is deposit, t is time taken, and c is just some unknown constant related to the interest rate. There's also the natural logarithm form of this equation, which will come in handy later:

ln( \frac{m}{d} ) = tc

Alright first we gotta find that constant c for this equation to be useful! Let's plug in stuff we know.

ln( \frac{4331.16}{4132.79} ) = (0.25)c

We know how much she'll have after one quarter (0.25 years), and we know how much she deposited initially.

After pressing some buttons on the calculator we'll find that c = 0.1875.

Great! Now we can use that formula to find how many years (t) it'll take to reach M=$8000. To save time I'm going to use the natural log form:

ln( \frac{8000}{4132.79} ) = t(0.1875)

That will give us t = 3.522 which means it'll take approximately 3.5 years for her deposit to reach $8000!
5 0
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Airida [17]

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Answer:

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Step-by-step explanation:

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3 years ago
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KiRa [710]

When given the scale factor and the factored size of the object, to find the original size, divide the factored size by the scale factor:


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Alchen [17]

Answer:

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