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Alla [95]
4 years ago
8

Jason went to his local zoo where 20% of it's exhibits featured canines. If the zoo features 25 exhibits in total, then how many

of the zoo's exhibits feature canines? Round your answer to the nearest whole number if necessary. _____________
Mathematics
1 answer:
Ratling [72]4 years ago
7 0

Answer:

\frac{25}{100}=\frac{x}{20}

And if we solve for the value of x we got:

x = 20* \frac{25}{100}=5

So then we can conclude that the number of canines is 5 for this case

Step-by-step explanation:

For this case we know that the total number of canines is 25 and 20% represent the canines so we can apply the following proportional rule:

\frac{25}{100}=\frac{x}{20}

And if we solve for the value of x we got:

x = 20* \frac{25}{100}=5

So then we can conclude that the number of canines is 5 for this case

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As a​ follow-up to a report on gas​ consumption, a consumer group conducted a study of SUV owners to estimate the mean mileage f
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Answer:

The 95​% confidence interval estimate for the mean highway mileage for SUVs is (18.29mpg, 20.91mpg).

Step-by-step explanation:

Our sample size is 96.

The first step to solve this problem is finding our degrees of freedom, that is, the sample size subtracted by 1. So

df = 96-1 = 95

Then, we need to subtract one by the confidence level \alpha and divide by 2. So:

\frac{1-0.95}{2} = \frac{0.05}{2} = 0.025

Now, we need our answers from both steps above to find a value T in the t-distribution table. So, with 95 and 0.025 in the t-distribution table, we have T = 1.9855.

Now, we find the standard deviation of the sample. This is the division of the standard deviation by the square root of the sample size. So

s = \frac{5.6}{\sqrt{96}} = 0.57

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M = T*s = 1.9855*0.57 = 1.31

For the lower end of the interval, we subtract the mean by M. So 19.6 - 1.31 = 18.29

For the upper end of the interval, we add the mean to M. So 19.6 + 1.31 = 20.91

The 95​% confidence interval estimate for the mean highway mileage for SUVs is (18.29mpg, 20.91mpg).

8 0
4 years ago
SOLVE FOR X ???????????????
Tomtit [17]

Answer:

8

Step-by-step explanation:

6x+4x+10=90

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Plz add it as brainliest

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3 years ago
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Answer:

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Step-by-step explanation:

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3 years ago
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1000cm²=0.1m²

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Step-by-step explanation:

please mark me as brainliest

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3 years ago
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