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rewona [7]
2 years ago
5

PLEASE HELP :)))

Mathematics
1 answer:
DerKrebs [107]2 years ago
5 0

Answer: 596 + 860 = 1456

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What would be the volume of (a) air (b) plastic in a ball with 25cm diameter made from plastic 2mm thick?
morpeh [17]

Answer:

Part a) The volume of the air is V=7,794.78\ cm^{3}

Part b) The volume of the plastic is V=386.45\ cm^{3}

Step-by-step explanation:

we know that

The volume of the sphere is equal to

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

step 1

Find the volume of the complete ball (air +plastic)

we have

r=25/2=12.5\ cm ------> the radius is half the diameter

substitute

V=\frac{4}{3}\pi (12.5)^{3}

V=8,181.23\ cm^{3}

step 2

Find the volume of the air

we have that

The plastic is 2 mm thick

Convert to cm

2 mm=2/10=0.2 cm

so

The radius of the interior of the ball is

r=12.5-0.2=12.3\ cm

substitute

V=\frac{4}{3}\pi (12.3)^{3}

V=7,794.78\ cm^{3} -----> this is the volume of the air (interior of the ball)

step 3

Find the volume of the plastic

we know that

The volume of the plastic is equal to the volume of the complete ball minus the volume of the air

so

8,181.23\ cm^{3}-7,794.78\ cm^{3}=386.45\ cm^{3}

3 0
3 years ago
Read 2 more answers
Drag numbers to write an equation for the line in slope-intercept form. Numbers may be used once, more than once, or not at all.
Volgvan

Answer:

Slope: -4

Y-intercept: 5

Step-by-step explanation:

The slope goes down 4 and over one which means that the slope is -4.

When X is 0, Y is 5

Good Luck!!

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2 years ago
$4,800,000 is what percent of $6,000,000?
mixer [17]
4,800,000/6,000,000 = 48/60 = 8/10 = 0.8

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so 4,800,000 is 80% of 6,000,000
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3 years ago
What trig function would I use to solve for x?
IRINA_888 [86]

Answer:

Cosine

Step-by-step explanation:

SohCahToa

The sides are: adjacent to the angle and are the hypotenuse.

(hope this helps :P)

8 0
2 years ago
Michaela pays her cell phone service provider $49.95 per month for 500 minutes. any additional minutes used cost $0.15 each. in
True [87]
75 additional minutes were used


$61.20-$49.95=$11.25

$11.25/$0.15=75 additional minutes
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