Abby bought an 8 pound bag of doog food for $7.40. How much does the bag cost per pound? (round to the nearest hundreth)

Mathematics

2 answers:

Sergio039 [100]2 years ago

7 0

Answer:

Step-by-step explanation:

kramer2 years ago

5 0

Answer:

0.92 per pound

Step-by-step explanation:

if you divide 7.40 from 8 it is 0.925. and if you multiply 0.925 by 8 it will give you 7.4. hope this helps.

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Rachael got a 550 on the analytical portion of the Graduate Record Exam (GRE). If GRE scores are normally distributed and have m

valina [46]

Answer:

Z=-2

This value means that the score of Rachel 550 it's 2 deviations below the mean of the population $\mu=600$

Step-by-step explanation:

1) Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

$\mu=600$ represent the population mean for the Graduate Record Exam (GRE)

$\sigma=25$ represent the population standard deviation for Graduate Record Exam (GRE)

2) Solution to the problem

Let X the random variable that represent the Graduate Record Exam (GRE) of a population, and for this case we know the distribution for X is given by:

$X \sim N(600,25)$