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nika2105 [10]
3 years ago
7

Help smart peep with 5. And6

Mathematics
1 answer:
tia_tia [17]3 years ago
6 0
Vejeieve veiiebd e628382628
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4.
Fittoniya [83]

Answer:

60

Step-by-step explanation:

200*0.30=60

Multiply the percent's by the total cost.

6 0
2 years ago
Read 2 more answers
Scores on an exam follow an approximately Normal distribution with a mean of 76.4 and a standard deviation of 6.1 points. What p
klasskru [66]

Answer:

99.89% of students scored below 95 points.

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 = 76.4, \sigma = 6.1

What percent of students scored below 95 points?

This is the pvalue of Z when X = 95. So

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

Z = \frac{95 - 76.4}{6.1}

Z = 3.05

Z = 3.05 has a pvalue of 0.9989.

99.89% of students scored below 95 points.

5 0
3 years ago
Find the missing quantity in the double number line.
timama [110]

Answer:

50

Step-by-step explanation:

So, you do 45 divided by 30. When u do that, u get 1.5. Then, u do 75 divided by 1.5 and u get 50! Hope this helps :))

5 0
2 years ago
Read 2 more answers
What is the difference of the fractions?
Naya [18.7K]

13/45, or option A, is the correct answer.

7 0
3 years ago
Which expression is equivalent to
Trava [24]

Answer:

3x + 18

Step-by-step explanation:

The 3 is multiplied by each number in the parentheses.

3 0
2 years ago
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