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slega [8]
2 years ago
14

70% of What number 56

Mathematics
1 answer:
Brilliant_brown [7]2 years ago
3 0
70\% \ of \ x =56 \\ \\   \frac{70}{100} \cdot x = 56  \\\\  \frac{7}{10} \cdot x=56 \\ \\ x=56 :  \frac{7}{10} \\ \\ x=56 \cdot  \frac{10}{7} \\ \\ x= \frac{560}{7} =80
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JulsSmile [24]
So based on place values, the One's place is occupied by 4. To round to this digit, you go one number to the right. If that number is 5 or higher, you add one to 4. If it is less than 5, you don't add any to 4. Since 7 is greater than 5, you add 1 to 4, giving you 5, since you can now remove all the other numbers to the right.

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6 0
2 years ago
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. If IQ scores are normally distributed with a mean of 100 and a standard deviation of 5, what is the probability that a person
bulgar [2K]

Answer:

2.28% probability that a person selected at random will have an IQ of 110 or greater

Step-by-step explanation:

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

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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 = 100, \sigma = 5

What is the probability that a person selected at random will have an IQ of 110 or greater?

This is 1 subtracted by the pvalue of Z when X = 110. So

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5 0
3 years ago
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Answer:

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6 0
2 years ago
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ryzh [129]
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3 0
3 years ago
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Convert the decimal to a percent: 3.5​
Varvara68 [4.7K]
(3.5 × 100) × 1100 = 350100.
Write in percentage notation: 350%
6 0
2 years ago
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