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alina1380 [7]
2 years ago
14

A car travels 24 km in 15 minutes. How far does it travel in 1 and a half hours

Mathematics
1 answer:
VladimirAG [237]2 years ago
4 0

Answer:

144 km

Step-by-step explanation:

1 hour and a half hour = 90 minutes.

In 15 minutes a car travels 24 km

In 1 minute a car travels (24÷15) = 1.6 km

In 90 minutes a car travels (90×1.6)= 144 km

Ans.- 144 km

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6 0
2 years ago
The mean amount of money spent on lunch per week for a sample of 100 students is $21. If the margin of error for the population
Digiron [165]

From the given mean and margin of error, the 99% confidence interval for the mean amount of money spent on lunch per week for all students is:

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<h3>How to calculate a confidence interval given the sample mean and the margin of error?</h3>

The confidence interval is given by the sample mean plus/minus the margin of error, hence:

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For this problem, we have that:

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Hence the bounds are given as follows:

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Hence the interval is [$19.50, $22.50].

More can be learned about confidence intervals at brainly.com/question/25890103

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2 years ago
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