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mylen [45]
3 years ago
7

Brian receives supplies for his pretzel business weekly. he usually works concession at three events a week and averages sales o

f 150 pretzels at each event. with his per-pretzel cost at $0.85, how much does he need to budget weekly for his supplies? a) $382.50 b) $510.00 c) $255.00 d) $765.00
Mathematics
2 answers:
Kisachek [45]3 years ago
8 0
The correct answer is a) $382.50.

He works 3 events and averages 150 pretzels; this is 3(150) = 450 pretzels.  Since his cost is $0.85 each, we have
450(0.85) = 382.50
xz_007 [3.2K]3 years ago
3 0

Answer: a) $ 382.50

Step-by-step explanation:

Since, According to the question , He receives supplies for his pretzel business weekly. he usually works concession at three events a week and averages sales of 150 pretzels at each event.

Therefore, Total pretzels for a week = 150\times 3 = 450

And, his each pretzel cost is  $0.85

So, he need to budget weekly for his supplies = Total pretzels for a week×each pretzel cost = 450\times 0.85 = 382.50

Therefore required answer is $ 382.50


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Answer:

a) Nothing, beause the distribution of the monthly rental prices are not normal.

b) 1.43% probability that the sample mean rent price will be greater than $900

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}}

(a) Suppose a one-bedroom rental listing in this large city is selected at random. What can be said about the probability that the listed rent price will be at least $930?

Nothing, beause the distribution of the monthly rental prices are not normal.

(b) Suppose a random sample 30 one-bedroom rental listing in this large city will be selected, the rent price will be recorded for each listing, and the sample mean rent price will be computed. What can be said about the probability that the sample mean rent price will be greater than $900?

Now we can apply the Central Limit Theorem.

\mu = 880, \sigma = 50, n = 30, s = \frac{50}{\sqrt{30}} = 9.1287

This probability is 1 subtracted by the pvalue of Z when X = 900.

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

By the Central Limit Theorem

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

Z = \frac{900 - 880}{9.1287}

Z = 2.19

Z = 2.19 has a pvalue of 0.9857

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mark me brainliest plz would make my day

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