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Pie
3 years ago
14

Can someone help with 21 and 22

Mathematics
1 answer:
iren [92.7K]3 years ago
5 0
21.
company A
$132 / 1200 = 0.11 cents per minute

company B
$260 / 2000 = 0.13 cents per minute

company A is 2 cents cheaper 

answer
3. Company A by 2  cents per minute 

---------
22.

ratio 7:10
so 7 + 10 = 17

357 / 17 = 21

boys to girls 7:10
so
boys = 7 x 21 = 147
girls = 10 x 21 = 210

asking for # of girls

so answer is
1.  210
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The shoelace drawer is 7.911 inches wider than the paperclip drawer.

<h3>Measurement difference between two drawers</h3>

The height of shoelace drawer is = 12.49 inches

The height of paperclip drawer is = 4.579 inches

Therefore the measurement difference between the two drawer is = 12.49 inches - 4.579 inches

= 7.911 inches

Therefore, the shoelace drawer is 7.911 inches wider than the paperclip drawer.

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2 years ago
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A spherical balloon has a 34-in. diameter when it is fully inflated. Half of the air is let out of the balloon. Assume that the
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Hi, to answer this question we have to calculate the volume of a sphere:

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Since diameter (d) = 2 radius (r)

Replacing with the value given:

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V = 4/3 π r³

V =4/3 π (17)³

V = 20,579.52 cubic inches

The volume of the half-inflated balloon is equal to the volume of the sphere divided by 2.

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To find the radius of the half-inflated balloon we have to apply again the volume formula and substitute v=10,289.76

10,289.76= 4/3 π r³

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10,289.76/ (4/3 π)= r³

2,456.5 = r³

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3 years ago
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Hello, Friend! ^^

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