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3 years ago

15

Giselle works as a carpenter and as a blacksmith. She earns $20 per hour as a carpenter and $25per hour as a carpenter and 30 ho

urs, and earned a total of $690.How long did Giselle work as a carpenter last week, and how long did she work as a blacksm

2 answers:

Ulleksa [173]3 years ago

8 0

Change 30 hours into minutes, then divide by 20 and 25

nirvana33 [79]3 years ago

3 0

She worked 18 hours as a blacksmith and 12 hours as a carpenter

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Mrac [35]

Answer:

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3 years ago

Calculate the data value that corresponds to each of the following z-scores.

Fynjy0 [20]

Answer:

a) 90.1

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c) 3.0915 hours

Step-by-step explanation:

The z-score measures how many standard deviations a score X is above or below the mean.

It is given by the following formula:

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

In which $\mu$ is the mean and $\sigma$ is the standard deviaition.

In all three cases, we have to find X

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$X = 3.0915$

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3 years ago