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Xelga [282]
3 years ago
6

Find the total surface area of the prism pictured

Mathematics
2 answers:
ivann1987 [24]3 years ago
8 0

Answer:

it's 319.2

Step-by-step explanation:

When I did it i got 250.2, but i think it 319.2

Tanya [424]3 years ago
5 0
To find the surface area of a prison, we need to find the areas of all the sides

Triangles:
2(1/2(8 * 6.9)) = 55.2

Bottom rectangle:

11 * 8 = 88

Congruent rectangles:

2(8 * 11 = 88) = 176

55.2 + 88 + 176 = 319.2

B; 319.2 sq inches
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I believe the answer is c
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2. Using the substitution method, Jose is solving the following system of equations
Svetradugi [14.3K]

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Step-by-step explanation:

the answer is 3 if you check very well

5 0
3 years ago
The population of a city decreases by 1.2% per year. If this year's population is 177,000, what will next year's population be,
Vsevolod [243]

Answer:

Initial value

177000

Final value

174,876

Decrease

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5 0
2 years ago
To join the game club, you must pay $7 a month plus
ivanzaharov [21]

Answer: Total cost/month = 7 + 3x

Step-by-step explanation:

This is only the total cost per month that is why it is only 7 and 3x since the number of downloaded games is not given.

I'm not sure about my answer but I hope that it helps.

8 0
2 years ago
The mean life of a television set is 119 months with a standard deviation of 14 months. If a sample of 74 televisions is randoml
irina [24]

Answer:

50.34% probability that the sample mean would differ from the true mean by less than 1.1 months

Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal probability distribution:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

Central limit theorem:

The Central Limit Theorem estabilishes that, for a random variable X, with mean \mu and standard deviation \sigma, the sample means with size n of at least 30 can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}

In this problem, we have that:

\mu = 119, \sigma = 14, n = 74, s = \frac{14}{\sqrt{74}} = 1.63

If a sample of 74 televisions is randomly selected, what is the probability that the sample mean would differ from the true mean by less than 1.1 months

This is the pvalue of Z when X = 119 + 1.1 = 120.1 subtracted by the pvalue of Z when X = 119 - 1.1 = 117.9. So

X = 120.1

Z = \frac{X - \mu}{\sigma}

By the Central Limit Theorem

Z = \frac{X - \mu}{s}

Z = \frac{120.1 - 119}{1.63}

Z = 0.68

Z = 0.68 has a pvalue of 0.7517

X = 117.9

Z = \frac{X - \mu}{s}

Z = \frac{117.9 - 119}{1.63}

Z = -0.68

Z = -0.68 has a pvalue of 0.2483

0.7517 - 0.2483 = 0.5034

50.34% probability that the sample mean would differ from the true mean by less than 1.1 months

8 0
3 years ago
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