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Ksju [112]
3 years ago
8

PLEASE HELP: The mass of a ball is 128 g. It has a density of 0.5 g/cm³. What is the volume of the ball? Show your work and plac

e a box around your answer. Optional Bonus point: what is the radius of the ball?
Mathematics
1 answer:
tiny-mole [99]3 years ago
7 0

Answer:

Part 1) The volume of the ball is 256 cm³

Part 2) The radius of the ball is 3.94 cm

Step-by-step explanation:

Part 1) we know that

The density is equal to divide the mass by the volume

D=m/V

Solve for the volume

The volume is equal to divide the mass by the density

V=m/D

In this problem we have

m=128 g

D=0.5 g/cm³

substitute

V=128/0.5=256 cm³

Part 2) what is the radius of the ball?

we know that

The volume of the sphere (ball) is equal to

V=\frac{4}{3}\pi r^{3}

we have

V=256\ cm^{3}

assume

\pi =3.14

substitute and solve for r

256=\frac{4}{3}(3.14)r^{3}

768=(12.56)r^{3}

r^{3}=768/(12.56)

r=3.94\ cm

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<u><em>a specific shade of red nail polish requires 7 parts of red to 2 parts of yellow. A mixture contains 35 quarts of red and 8 quarts of yellow. </em></u>

<u><em>How can you fix the mixture to make the correct shade of red? </em></u>

<u><em>: </em></u>

<u><em>The red:yellow ratio is 7:2, we can write the mixture as 7%2F9 or 77.8% red </em></u>

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<u><em>: </em></u>

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<u><em>: </em></u>

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<u><em>; </em></u>

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<u><em>Check this, it still contains 35 quarts of red but the percentage has changed </em></u>

<u><em>35%2F45 = 77.8% red which is what we want, a ratio of 7:2</em></u>


<em>here you go i hope it helps</em>


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