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Gekata [30.6K]
3 years ago
8

I need to know whether the answer is A, B, C, or D.

Mathematics
1 answer:
Anika [276]3 years ago
7 0
The answer would be c
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After being filled, a basketball loses 3.2% of its air every day. Considering that the initial volume of the ball was 840 cubic
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1 year ago
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A college student Earned $6500 during summer vacation working as a waiter. The student invested Part of the money at 10% and the
Juliette [100K]

Answer:

The amount invested at 10% rate is $ 2200

Step-by-step explanation:

Given as :

The total amount earn by student = $6500

The total interest received at the end of year = $607

Let the amount invested at 10% rate = $x

So, The amount invested at 9% rate = ($6500 - $x)

Let the time for which money invested = 1 year

<u>Now from Simple Interest method :</u>

SI = \frac{principal\times Rate\times Time}{100}

Or, SI_1 + SI_2 = \frac{x\times 10\times 1}{100} + \frac{(6500-x)l\times 9\times 1}{100}

Or, SI_1 + SI_2 = (\frac{10x}{100})+\frac{(6500-x)\times 9}{100}

Or, $607 × 100 = 10x + (6500-x) × 9

Or, $60700 = 10x- 9x + 58500

Or, $60700 - $58500 = x

Or , 2200 = x

∴ x = 2200

So, The amount invested at 10% rate = $x = $ 2200

Hence The amount invested at 10% rate is $ 2200   Answer

5 0
3 years ago
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