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tigry1 [53]
2 years ago
11

Just do these two problems for me and I’ll be so happy

Mathematics
1 answer:
sveticcg [70]2 years ago
4 0
5. y = x + 7
6. y = -x + 1
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Suppose SAT Writing scores are normally distributed with a mean of 488488 and a standard deviation of 111111. A university plans
makvit [3.9K]

Answer:

The minimum score required for the scholarship is 644.

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 = 488, \sigma = 111

What is the minimum score required for the scholarship?

Top 8%, which means that the minimum score is the 100-8 = 92th percentile, which is X when Z has a pvalue of 0.92. So it is X when Z = 1.405.

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

1.405 = \frac{X - 488}{111}

X - 488 = 1.405*111

X = 644

The minimum score required for the scholarship is 644.

4 0
3 years ago
The volume of a sphere is 80pi cm3. What its is surface area to the nearest whole number
vlabodo [156]
Volume = (4/3) * PI * radius^3
80 * PI = (4/3) * PI * radius^3
The 'PI's' cancel out leaving
80 = (4/3) * radius^3
radius^3 = 80/(4/3)
radius^3 = 60

radius = cube root (60)
3 0
3 years ago
Answer this question please and thank you
leonid [27]

Answer:

10

Step-by-step explanation:

Since 1 1/4 x 9 = 11 we can't just jam the extra half a pound into the containers. Therefore, we need 10 containers to securely place the 11 1/2lbs of salad into the containers.

4 0
3 years ago
Read 2 more answers
Uhm help please no links -^-
devlian [24]

Answer:

<u>x = 58</u>

Step-by-step explanation:

180 - 148 = 32

32 + 90 + x = 180

122 + x = 180

180 - 122 = x

x = 58

Have a nice day!

6 0
3 years ago
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Nita wants to buy a new keyboard for her computer. She will buy the keyboard when it is on sale for under $50 Write an inequalit
adoni [48]

<u><em>This would be k < 50.</em></u>

This inequality states that k, the price at which Nita wants to buy the new keyboard, is less than 50 dollars.

3 0
3 years ago
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