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irinina [24]
2 years ago
9

a pharmacist mixes 5g of a powder with 45cm³ of water to make a prescription medicine. how much powder should she mix with 81cm²

of water to make a larger amount of the same medicine?​
Mathematics
1 answer:
den301095 [7]2 years ago
6 0

Answer:

She should mix 9 g of powder

Step-by-step explanation:

From the question, we can have a ratio for powder to water

we have 5 g of powder mixed with 45 cm^3 of water

So, for every 1 g, we have 5g/45 cm^3

we have 9 cm^3

So let’s relate this to the bigger water mix

Recall from above; we have the mixing as 1 g per 9 cm^2 of water

1g per 9 cm^2

x g per 81 cm^2

81 * 1 = x * 9

9x = 81

x = 81/9

x = 9g

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Ng Order of Operations George has $15. He would like to know if he has enough money to see a movie ($9.00) and buy a pretzel ($2
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Answer:

No, George does not have enough money to buy everything.

The correct expression is:

15 - 9 - 2.65 - 1.35 - 2(1.74)

Step-by-step explanation:

Given that:

Money present with George initially = $15

Money required to see the movie = $9

Money required to buy a pretzel = $2.65

Money required to buy a drink = $1.35

Money required to buy 2 veggie cups = $2(1.74)

To find:

Whether there is enough money with George to complete all the tasks.

Solution:

First of all, let us calculate all the money required and then we can subtract all the money from the initial amount to find whether there is enough money present with George.

If the result is in positive, there is enough money with George.

Total money required for all the activities = $9 + $2.65 + $1.35 + $2(1.74) = $16.48

Expression = $15 - $16.48 = -$1.48

The result is negative, therefore there is not enough money.

The correct expression is:

15 - 9 - 2.65 - 1.35 - 2(1.74)

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