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6 months ago

Dr. Jekyll has 180 mL of solution that is 20% acid. How many mL of

Mathematics

2 answers:

madam [21]6 months ago

8 0

Answer:

50%

Step-by-step explanation:

So here's what I think :

180 x 20% = 36

This 36 isn't that important.

20% + 30% = 50%

Ne4ueva [31]6 months ago

5 0

Answer: 54 mL

Step-by-step explanation: First, you need to find how many milliliters 10% is. To do this, divide 180 by 10, which equals 18. Then, since it needs to be thirty percent, times 18 by 3, which equals 54 mL. Hope this helps.

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mestny [16]

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3 years ago

What can you times by 9 to 1296 <br> What can you multiply by 9 to get 1296

ozzi

Answer:

144, would be your answer

Step-by-step explanation: Multiply 144 by 9 and you get 1296.

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3 years ago

You have $7.45. You buy 8 items that cost $0.83 each. How much money do you have left

Agata [3.3K]

Answer:

$0.81

Step-by-step explanation:

left

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2 years ago

You know that 5^2=25. How can you use this fact to evaluate 5^4

PIT_PIT [208]

Answer:

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Step-by-step explanation:

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2 years ago

A is inversely proportional to b. If a=7.2 when b=-4, what will a equal when b=6?

Tpy6a [65]

Answer:

Step-by-step explanation:

To find the value of a when b=6 we must first find the relationship between them.

The statement

a is inversely proportional to b is written as

$a \: \: \alpha \: \: \frac{k}{b}$

where k is the constant of proportionality

When a = 7.2 , b = -4

So we have

$7.2= \frac{k}{ - 4}$

k = 7.2 × - 4

k = - 28.8

So the formula for the variation is

$a = - \frac{28.8}{b}$

When

b = 6

That's

$a = - \frac{28.8}{6}$

We have the final answer as

Hope this helps you

7 0

3 years ago