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4 years ago

12

You are preparing for a breakfast party and need enough milk for 20 people. Each person will drink about 200 milliliters of milk

. Which is the better estimate of the amount of milk you should prepare: 400 milliliters or 4 liters?

1 answer:

forsale [732]4 years ago

6 0

You should prepare 4 liter of milk because if you prepare 400 mL it wouldn't be enough.

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3 years ago

A pharmacist needs 500 milliliters of a 20% phenobarbital solution but has only 5% and 25% phenobarbital solutions available. Fi

sladkih [1.3K]

Let x be ml of 5% soln.

let 500-x be ml of 25% soln.

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x*.05=.05x

(500-x)*.25=125-.25x

500*.20=100

.

.05x+125-.25x=100

-.2x=-25

x=-25/-.2

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7 0

3 years ago

Stephanie has 24 pieces of fruit. She only has apples and oranges. If the ratio of apples to oranges that Stephanie has is 3:5,

Ivan

Answer:

apples = 9

Oranges = 15

Step-by-step explanation:

Let the apples = x

Let the oranges = y

x + y = 24

x/y = 3/5 Cross multiply

5x = 3y Divide by 5

x = 3/5 y Substitute for x in x + y = 24

3/5 y + y = 24 Change 3/5 to a decimal

0.6 y + y = 24 Combine

1.6 y = 24 Divide by 1.6

y = 24/1.6

y = 15

x + y = 24 Substitute for y

x + 15 = 24 Subtract 15

x = 24 - 15

x = 9

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3 years ago