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Kamila [148]
3 years ago
5

How much money in total would be paid by the 1st 150 student

Mathematics
1 answer:
spin [16.1K]3 years ago
7 0
113.25 because the middle ground of 1 - 150 students is 75 and then 1+150=151  2+149+151 but instead of doing that again and again just multiply the lowest number and the highest number by the middle ground 
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The daughter is 36 years younger than her mother. How many years ago was the mother 5 times he daughters age, if she is 50 now?
Anni [7]

Answer:

5 years ago

Step-by-step explanation:

8 0
3 years ago
Suppose the lifetime of a cell phone battery is normally distributed with a mean of 36 months and a standard deviation of 2 mont
solong [7]

Answer:

They should guarantee the lifetime of their batteries for 32 months.

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 36 months and a standard deviation of 2 months.

This means that \mu = 36, \sigma = 2

If the company wants to replace no more than 2% of all batteries, for how many months should they guarantee the lifetime of their batteries?

The guarantee should be the 2th percentile of lengths, which is X when Z has a pvalue of 0.02. So X when Z = -2.054.

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

-2.054 = \frac{X - 36}{2}

X - 36 = -2.054*2

X = 31.89

Rounding to the closest month, 32.

They should guarantee the lifetime of their batteries for 32 months.

3 0
2 years ago
What is an integer for negative four
Goshia [24]
A integer for -4 would be +4
7 0
3 years ago
What is an outlier in math?
Flura [38]
A outlier is something spread out from the rest for example you have the numbers 12, 9, 3,10, 16, 89 obviously the outlier is 89 so the number spread from the rest 
7 0
3 years ago
Read 2 more answers
What would x^4-10x^2+25 be equivalent to
Mademuasel [1]

Answer:

if i can get brainliest that would be great

IF Factor x4−10x2+25

x4−10x2+25

=(x2−5)(x2−5)

Answer:

(x2−5)(x2−5)

IF simplify

x4−10x2+25

There are no like terms.

Answer:

=x4−10x2+25

7 0
3 years ago
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