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denis23 [38]
2 years ago
5

Rotate the point (7,8) around the origin 90 degrees counterclockwise.

Mathematics
1 answer:
Juliette [100K]2 years ago
8 0
The answer is (-8,7)

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A set of four postcards costs $1.00. Single postcards cost $0.50. What is the least amount of money you
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Answer: 3 Sets of the 4 post cards and 3 of the single post cart sets.

Step-by-step explanation:

You buy 3 of the 4 post card set becuase that is the most you can get of those to get under 15 post cards.

You would now have 12 postcards now you have to buy 3 of the single set to get to 15 cards

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A person makes 300 dollars a month babysitting. If they
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They will save $90 each month

Step-by-step explanation:

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The measures of the angles of a triangle are 55°, 25, and 100°. What is the measure of the largest exterior angle
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Step-by-step explanation:

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A professor at a local university noted that the exam grades of her students were normally distributed with a mean of 73 and a s
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Answer:

The minimum score of those who received C's is 67.39.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

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 problem, we have that:

\mu = 73, \sigma = 11

If 69.5 percent of the students received grades of C or better, what is the minimum score of those who received C's?

This is X when Z has a pvalue of 1-0.695 = 0.305. So it is X when Z = -0.51.

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

-0.51 = \frac{X - 73}{11}

X - 73 = -0.51*11

X = 67.39

The minimum score of those who received C's is 67.39.

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3 years ago
UN<br><br><br>2. What is the conversion from cubic metres to litres?​
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Answer:

1 cubic meter equals 1000 liters

Step-by-step explanation:

i think this is right

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3 years ago
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