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Natasha2012 [34]

4 years ago

6

Alice makes bracelets and sells them for $5 each. If it cost her $2 to make a bracelet, what percent of the money she makes is p

rofit?

1 answer:

madam [21]4 years ago

3 0

60 % is the profit she made

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If every gram of salt is 20.9% chlorine, how much is required to make a 220 ppm chlorine solution with 350 grams of water?

Temka [501]

Answer:

The amount of salt required is 0.3685 grams.

Step-by-step explanation:

20.9% of 1 gram of salt is chlorine, which means the grams of chlorine in 1 gram of salt are

$\dfrac{20.9\%}{100\%} *1\: gram = 0.209g\: \text{chlorine}$

Now, to make 220 ppm solution, it must be that

$\dfrac{220}{10^6} = \dfrac{y}{350+y},$

where $y$ is the grams of chlorine required.

We rearrange the equation and solve for $y:$

$220(350+y) = 10^6y$

$77000+220y =10^6y$

$77000 = (10^6-220)y$

$y = \dfrac{77000}{999780}$

$\boxed{y= 0.07702g}$

since 1 gram of salt has 0.209 grams of chlorine, 0.07702g of chlorine corresponds to

$\dfrac{0.07701}{0.209} = 0.3685g {\text{ of salt. }$

Thus the amount of salt required is 0.3685 grams.

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3 years ago

The question down below

Ratling [72]

Opposite angles are congruent. So the correct answer is A. x=118

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3 years ago

Write a decimal that represents the value of one 1 bill and 5 quarters

andrey2020 [161]

Answer:

$2.25

Step-by-step explanation:

Note that 4 quarters = one dollar, which means that one quarter = 1.00/4 = 0.25

Multiply the value of 1 quarter (0.25) with the amount of quarters there are:

0.25 x 9 = 2.25

$2.25 is your answer

~

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4 years ago

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Mrac [35]

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i feel like an astronaunt rolling deep

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3 years ago

What is the basic fact of 7 and 2800

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Is there more to this question?

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