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Colt1911 [192]
3 years ago
10

A person is skateboarding to their local skate shop to pick up some sick rims. They skate at 8 miles per hour. The store is 2.5

miles away. How long will it take them to get to the store in hours?
Mathematics
1 answer:
belka [17]3 years ago
3 0

Answer: 0.3125 hours

Step-by-step explanation:

The formula for time taken to cover a distance is:

= Distance / Speed

Distance = 2.5 miles

Speed = 8 miles per  hour

Time taken = 2.5 / 8

= 0.3125 hours

In minutes this is:

= 0.3125 * 60 mins

= 19 mins approx

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A company with a fleet of 150 cars found that the emissions systems of only 5 out of the 22 they tested failed to meet pollution
Ugo [173]

Answer: No, the percentage of the fleet out of compliance is not different from their initial thought.

Step-by-step explanation:

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he company initially believed that 20% of the fleet was out of compliance. Is this strong evidence the percentage of the fleet out of compliance is different from their initial thought.

so, p = 0.2

Hypothesis would be

H_0:p=\hat{p}\\\\H_a:p\neq \hat{p}

So, the t test statistic value would be

t=\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}\\\\\\t=\dfrac{0.23-0.20}{\sqrt{\dfrac{0.2\times 0.8}{22}}}\\\\\\t=\dfrac{0.03}{0.085}\\\\t=0.353

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