6 litros<br> Para 60<br> alumnos

A cell phone company offers two different monthly text-messaging plans as shown in the table below. For what number of text mess

HACTEHA [7]

Answer:

c

Step-by-step explanation:

8 0

3 years ago

Estimate the domain

natima [27]

Take a look at the horiz. line. It has arrows at both ends. That means that x goes on forever in both directions. Thus, the domain of this function is (-inf, +inf).

4 0

3 years ago

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A store sells packages of batteries. The package with the best deal has the highest ratio of number of batteries to

kotykmax [81]

Answer:

3 for $8

Step-by-step explanation:

Firstly, 3 for $8 is much better than 5 for $8. Same for 12 for $24 being better than 14 for $24, because it's the same price for a different amount. Now we multiply 3 for $8 by 3, to get 9 for $24, which is better than 12 for $24, so the answer is 3 for $8

5 0

3 years ago

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Three potential employees took an aptitude test. Each person took a different version of the test. The scores are reported below

kondaur [170]

Answer:

Due to the higher z-score, Norma should be offered the job

Step-by-step explanation:

Z-score:

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 question:

Whoever has the higher z-score should get the job.

Norma:

Norma got a score of 84.2; this version has a mean of 67.4 and a standard deviation of 14.

This means that $X = 84.2 \mu = 67.4, \sigma = 14$