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Brums [2.3K]
4 years ago
9

Help me with 2 and 3 thanks!

Mathematics
1 answer:
Harlamova29_29 [7]4 years ago
7 0
I need the answer too
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The head of the Westlane Cultural Center wants to get a sense of how quickly pledges from donors arrive at the center. It takes
Rzqust [24]

Answer:

95.64% probability that pledges are received within 40 days

Step-by-step explanation:

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.

In this problem, we have that:

\mu = 28, \sigma = 7

What is the probability that pledges are received within 40 days

This is the pvalue of Z when X = 40. So

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

Z = \frac{40 - 28}{7}

Z = 1.71

Z = 1.71 has a pvalue of 0.9564

95.64% probability that pledges are received within 40 days

7 0
3 years ago
Ron works 5 hours for a total of $300. He deposits all of his money in his account. He is trying to save a $500 for a new LED TV
9966 [12]
Ron must work 9 hours. If he makes 300 every 5 hours, that means he makes 60 every hour. 60x9 = 540
3 0
3 years ago
Can somebody please help me out:))
jeyben [28]

Answer:

50ft

Step-by-step explanation:

Hi,

Considering that one side is equal to 38 degrees, we know this isn't a 30 - 60 - 90 triangle.

One of the legs is equal to 40 feet

So, tan(b) = 40/x

tan(38 degrees) is 0.78 round up to 0.8 (if that's what your teacher wants)

0.8 = 40/x

0.8x = 40

x = 50ft

I hope this helps

8 0
3 years ago
Reading Readiness, Inc. has provided you its list of accounts and balances as of January 31. The Controller has asked you to pre
xeze [42]

The preparation of Reading Readiness, Inc.'s multi-step Income Statement for the month ended January 31 is as follows:

Reading Readiness, Inc.

Income Statement

For the month ended January 31

Sales Revenue              $175,500

Less:

Sales Returns                      4,700

Sales Discounts                  6,000

Net Sales                     $164,800

Cost of Goods Sold         67,700

Gross profit                    $97,100

Expenses:

Salaries and Wages     $25,900

Depreciation Expense    13,800

Rent Expense                24,000

Operating expenses   $63,700

Operating income     $33,400

Interest Expense              1,600

Income before tax     $31,800

Income tax expense       7,700

Net income                 $24,100

Data and Calculation:

Gross profit percentage = 59% ($97,100/$164,800 x 100)

Thus, the net income after deducting the income tax expense is $24,100.

Learn more: brainly.com/question/24257787

4 0
3 years ago
What is the domain of the function using the graph?
Fofino [41]

The answer is B) x is equal to all real numbers.

The domain of a function is the numbers for x that you can put in. Although the y-values are restricted here, you can put any number you want in for x. Therefore, x is equal to all real numbers.

6 0
3 years ago
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