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WINSTONCH [101]
3 years ago
11

For his book report, Bobby made color copies and black-and-white copies. The black-and-white copies cost $2.75 in all. The color

copies cost $0.08 each. How many color copies did Bobby make if he spent $4.03 in all?
Mathematics
1 answer:
AfilCa [17]3 years ago
8 0
4.03-2.75=1.28

1.28 divided by 0.08 is 16

He made 16 color copies.
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Two drivers, Alison and Kevin, are participating in a drag race. Beginning from a standing start, they each proceed with a const
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Answer:

Alison wins against Kevin by 0.93 s

Step-by-step explanation:

Alison covers the last 1/4 of the distance in 3 seconds, at a constant acceleration a_a, we have the following equation of motion

s/4 = a_at_a^2/2

where s (m) is the total distance, ta = 3 s is the time

s = 4a_a3^2/2 = 18a_a

a_a = s/18

Similarly, Kevin overs the last 1/3 of the distance in 4 seconds, at a constant acceleration a_k, we have the following equation of motion:

s/3 = a_kt_k^2/2

tk = 4 s is the time

s = 3a_k4^2/2 = 24a_k

a_k = s/24

Since a_a = s/18 we can conclude that a_a > a_k, so Alison would win.

The time it takes for Alison to cover the entire track

s = a_aT_a^2/2

T_a^2 = 2s/a_a = 2s/(s/18) = 36

T_a = \sqrt{36} = 6 s

The time it takes for Kevin to cover the entire track

s = a_kT_k^2/2

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So Alison wins against Kevin by 6.93 - 6 = 0.93 s

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3 years ago
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Answer:

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Step-by-step explanation:

Applying,

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Therefore,

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From the diagram,

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Substitute into equation 1

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OT = 15

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