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PIT_PIT [208]
3 years ago
9

Clare has 130 songs in her music collection. Fifty-nine of the songs are rock and roll. About what percent of the songs are rock

and roll?
Mathematics
2 answers:
Vlad1618 [11]3 years ago
4 0
Hi lovely,

The answer you're looking for would be 76.7

.59x130 = 76.7
kvasek [131]3 years ago
3 0
59/130 x 100 = 45.38%

answer: about 45% <span>of the songs are rock and roll</span>
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A rocket is launched upward with a velocity of 288 feet per second from the top of a 60-foot building. What is the maximum heigh
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Answer:

288 × 60=17280 feet

Step-by-step explanation:

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Jane says that she can use addition to show that the graphs of 2x - 3y = 1 and 2x + 3y = 2 are intersecting lines. In two or mor
iogann1982 [59]
For this case we have the following equations:
 2x - 3y = 1
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 When adding both equations we observe that:
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3 years ago
8 workers complete the construction of wall 6 days. How many workers are needed to complete the construction in 4 days?
ElenaW [278]

Answer:

I came up with -12

Step-by-step explanation:

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x workers = 4 days faster to complete

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2 years ago
The lengths of bolts in a batch are distributed normally with a mean of 3 cm and a standard
ValentinkaMS [17]

Answer:

0.8413 = 84.13% probability that a bolt has a length greater than 2.96 cm.

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 3 cm and a standard deviation of 0.04 cm.

This means that \mu = 3, \sigma = 0.04

What is the probability that a bolt has a length greater than 2.96 cm?

This is 1 subtracted by the p-value of Z when X = 2.96. So

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

Z = \frac{2.96 - 3}{0.04}

Z = -1

Z = -1 has a p-value of 0.1587.

1 - 0.1587 = 0.8413

0.8413 = 84.13% probability that a bolt has a length greater than 2.96 cm.

3 0
2 years ago
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