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Maurinko [17]
2 years ago
9

PLEASE HELP, I'LL GIVE U BRAINLY

Mathematics
1 answer:
Helen [10]2 years ago
6 0

Answer:

im not sure but i think its D

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Which expression is a perfect cube?
Blizzard [7]

Answer:

The answer is b

Step-by-step explanation:

I just took the quiz

5 0
3 years ago
Suppose that one-way commute times in a particular city are normally distributed with a mean of 15.43 minutes and a standard dev
vovikov84 [41]

Answer:

Yes, a commute time between 10 and 11.8 minutes would be unusual.

Step-by-step explanation:

A probability is said to be unusual if it is lower than 5% of higher than 95%.

We use the normal probability distribution to solve this question.

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 = 15.43, \sigma = 2.142

Would it be unusual for a commute time to be between 10 and 11.8 minutes?

The first step to solve this problem is finding the probability that the commute time is between 10 and 11.8 minutes. This is the pvalue of Z when X = 11.8 subtracted by the pvalue of Z when X = 10. So

X = 11.8

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

Z = \frac{11.8 - 15.43}{2.142}

Z = -1.69

Z = -1.69 has a pvalue of 0.0455

X = 10

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

Z = \frac{10 - 15.43}{2.142}

Z = -2.54

Z = -2.54 has a pvalue of 0.0055

So there is a 0.0455 - 0.0055 = 0.04 = 4% probability that the commute time is between 10 and 11.8 minutes.

This probability is lower than 4%, which means that yes, it would be unusual for a commute time to be between 10 and 11.8 minutes.

7 0
3 years ago
HELLP MAHHHH PLEASEE!!!
Anika [276]

Answer:

12*5/6*4 = 40 liters

Step-by-step explanation:

3 0
3 years ago
Martin is playing a probability game with his friend. He places 9 blue marbles, 8 red marbles, and 3 white marbles in a
Sliva [168]

8/8 6/8 so your going to take 2 from 8/8 so that would be 6/8

5 0
3 years ago
What values are needed to make each expression a perfect square trinomial?
bogdanovich [222]
For the first one, find a number in which, when factored, will give you 4.

x² + 4x + 4
x             2
x             2

(x + 2)(x+ 2)

4 is your best answer



2. x² - 10x + ____
    
Same for this question. Find a number that, when factored, will give you -10

-100

x² - 10x + 25
x            - 5
x            -5

(x - 5)(x - 5)

25 is your answer


hope this helps
7 0
3 years ago
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