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nevsk [136]
3 years ago
14

Eight friends attend a readathon. They take turns reading aloud for a total of 3 hours. If each friend reads for the same amount

of time what fraction of an hour does each friend spend reading?
Mathematics
1 answer:
Brilliant_brown [7]3 years ago
3 0
They each read 22 1/2 minutes which would be 22.5/60
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Which expression is equivalent to r^m ÷ r^n?
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R^m ÷ r^n is equal to r^(m-n). 

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Put a check by the three numbers that are prime numbers.<br> 1<br> 7<br> 15<br> 21
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Answer:

1

7 ✔️

15

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3 years ago
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Which function has an axis of x=-2
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8 0
3 years ago
The systolic blood pressure (BP) of adults in the USA is nearly normally distributed with a mean of 121 and standard deviation o
Wittaler [7]

Answer:

Around 0.73% of adults in the USA have stage 2 high blood pressure

Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the z-score 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 p-value, we get the probability that the value of the measure is greater than X.

Mean of 121 and standard deviation of 16.

This means that \mu = 121, \sigma = 16

Around what percentage of adults in the USA have stage 2 high blood pressure

The proportion is 1 subtracted by the p-value of Z when X = 160. So

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

Z = \frac{160 - 121}{16}

Z = 2.44

Z = 2.44 has a p-value of 0.9927.

1 - 0.9927 = 0.0073

0.0073*100% = 0.73%

Around 0.73% of adults in the USA have stage 2 high blood pressure

5 0
3 years ago
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Arte-miy333 [17]
Plotting the 4 points and doing visual inspection will tell us if the quadrilateral is a parallelogram. We can also do analytical techniques which are to determine the slope and the distance between the points. Doing either of these two will give us
<span>B. Yes,TUVW quadrilateral s a parallelogram because there are two pairs of parallel sides.
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4 0
3 years ago
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