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stealth61 [152]
2 years ago
7

Bill and Joe leave their house at the same time heading in opposite directions. If Bill is driving three times faster than Joe a

nd it takes them three hours to be 120 miles apart, how fast is Bill driving?
Mathematics
1 answer:
Arisa [49]2 years ago
4 0

The problem statement gives you the relationship between their speeds, and it gives you information you can use to find their total speed. You solve this by finding the total speed, then the proportion of that belonging to Bill.

The total speed is (120 mi)/(3 h) = 40 mi/h.

The speed ratio is ...

... Bill : Joe = 3 : 1

so the speed ratio Bill : Total is ...

... 3 : (3+1) = 3:4.

Bill's speed is (3/4)×(40 mi/h) = 30 mi/h.

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<u>Answer-</u>

The standard error of the confidence interval is 0.63%

<u>Solution-</u>

Given,

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x = 255 (number of people who bought)

The mean of the sample M will be,

M=\frac{x}{n} =\frac{255}{2373} =0.1075

Then the standard error SE will be,

SE=\sqrt{\frac{M\times (1-M)}{n}}

SE=\sqrt{\frac{0.1075\times (1-0.1075)}{2373}}=\sqrt{\frac{0.0959}{2373}}=0.0063=0.63\%

Therefore, the standard error of the confidence interval is 0.63%




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2 years ago
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Ilia_Sergeevich [38]
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3 0
2 years ago
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Three judges measure the lap times of a runner and each measurement is different from the others by a few hundredths of a second
ohaa [14]

Answer:

Systematic error

Step-by-step explanation:

Assuming that none of the judges are biased, the most likely reason for this difference is the occurrence of systematic errors.

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A car dealership has 24 feet of dividers with which to enclose a rectangular play space in a corner
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7 0
2 years ago
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alexandr1967 [171]

Answer:

the number of additional she needed is 135

Step-by-step explanation:

The computation is shown below:

GIven that

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5 0
2 years ago
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