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3 years ago

Tracy works at the Pizza Place. She earns $4.50 an hour plus tips. Last week, she earned a total

Mathematics

1 answer:

sweet [91]3 years ago

8 0

Answer:

She work 23 hours.

Step-by-step explanation:

Given:

Tracy works at the Pizza Place. She earns $4.50 an hour plus tips.

Last week, she earned a total of $156.00, of which $52.50 was tips.

Now, to find the number of hours she work.

Total salary = $156.00

Amount of tips = $52.50.

So, first we deduct the amount of tips from the total salary:

$\$156.00-\$52.50\\=\$103.50.$

Thus, the remaining salary = $103.50.

As, given salary she earns an hour = $4.50.

And then, to get the number of hours she work last week by dividing $103.50 the remaining salary by $4.50:

$103.50\div 4.50$

$=23\ hours.$

Therefore, she work 23 hours.

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Step-by-step explanation:

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3 years ago

An art history professor assigns letter grades on a test according to the following scheme.A: Top 5% of scoresB: Scores below th

adoni [48]

Answer:

Grade B score:

$76 \leq x \leq 89$

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 73.3

Standard Deviation, σ = 9.7

We are given that the distribution of score on test is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

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We have to find the value of x such that the probability is 0.62

$P( X > x) = P( z > \displaystyle\frac{x - 73.3}{9.7})=0.62$

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$=P( z \leq \displaystyle\frac{x - 73.3}{9.7})=0.38$

Calculation the value from standard normal z table, we have,

$\displaystyle\frac{x - 73.3}{9.7} = 0.305\\\\x = 76.26$

We have to find the value of x such that the probability is 0.05

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Calculation the value from standard normal z table, we have,

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3 years ago

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wolverine [178]

Answer:

The answers would be

78/3

Step-by-step explanation:

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3 years ago

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3 years ago

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joja [24]

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