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2 years ago

8

What's the answer ?

t{25 \times 4} " alt=" \sqrt{25 \times 4} " align="absmiddle" class="latex-formula">

2 answers:

mezya [45]2 years ago

7 0

Answer:

$\sqrt{25 \times 4}$

= $\sqrt{5²×2²}$ =±[5×2]=±10

Dovator [93]2 years ago

5 0

Answer: 10

No matter if you simplify the square roots or not before multiplying, you get 10.

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crimeas [40]

Answer:

A. x≥4 ( red on 4)

B. x≤4 ( red on 4)

C. x>4 (blue on 4)

D. x<4 (blue on 4)

Step-by-step explanation:

illustrated

A. x≥4 ( red on 4)

B. x≤4 ( red on 4)

C. x>4 (blue on 4)

D. x<4 (blue on 4)

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3 years ago

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podryga [215]

Answer:

1st Option is correct

Step-by-step explanation:

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2 years ago

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3 years ago

Mercury has a density of 13.6 g/mL. A sample of mercury weighs 2.25 kg. What volume does it occupy

laila [671]

Answer:

165 mL

Step-by-step explanation:

Density is mass divided by volume:

D = M / V

Solving for volume:

V = M / D

The density is given in g/mL. So first let's convert the mass from kg to g:

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8 0

3 years ago

How much water must be evaporated from 64 ounces of a 2% salt solution to make a 10% salt solution?

Rufina [12.5K]

$64 \times 2\%=64 \times 0.02=1.28$
64 ounces of a 2% salt solution contains 1.28 ounces of salt and thus 62.72 ounces of water.

The mass of the 10% solution is (x+1.28), where x is the mass of water.
1.28 divided by (x+1.28) must be equal to 10%.
$\frac{1.28}{x+1.28} \times 100\%=10\% \\
\frac{1.28}{x+1.28} \times 100=10 \\
1.28 \times 100=10(x+1.28) \\
128=10x+12.8 \\
115.2=10x \\
x=11.52$

The 10% solution contains 11.52 ounces of water.
$62.72-11.52=51.2$

51.2 ounces of water must be evaporated.

7 0

3 years ago