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lidiya [134]
2 years ago
8

Henry owns a small business selling clothing. He knows that in the last week 70 customers paid cash, 20 customers used a debit c

ard, and 22 customers used a credit card.
Based on these results, express the probability that the next customer will pay with something other than a debit card as a percent to the nearest whole number
Mathematics
1 answer:
bixtya [17]2 years ago
4 0

Answer:

80%

Step-by-step explanation:

it’s 82% but rounded its 80

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he life of light bulbs is distributed normally. The variance of the lifetime is 625 and the mean lifetime of a bulb is 540 hours
almond37 [142]

Using the normal distribution, it is found that there is a 0.877 = 87.7% probability of a bulb lasting for at most 569 hours.

<h3>Normal Probability Distribution</h3>

The z-score of a measure X of a normally distributed variable with mean \mu and standard deviation \sigma is given by:

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

  • The z-score measures how many standard deviations the measure is above or below the mean.
  • Looking at the z-score table, the p-value associated with this z-score is found, which is the percentile of X.

The mean and the standard deviation are given, respectively, by:

\mu = 540, \sigma = \sqrt{625} = 25

The probability of a bulb lasting for at most 569 hours is the <u>p-value of Z when X = 569</u>, hence:

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

Z = \frac{569 - 540}{25}

Z = 1.16

Z = 1.16 has a p-value of 0.877.

0.877 = 87.7% probability of a bulb lasting for at most 569 hours.

More can be learned about the normal distribution at brainly.com/question/24663213

#SPJ1

8 0
2 years ago
Please help at least one of them number it please!!!!
andrew11 [14]

Answer:

Step-by-step explanation:

1. k - 5

2. 31g

3. b - 43

4. u - 36

5. 15r

6. 21/q

7. 7 + j or j + 7

8. 33/n

9. a + 23

10. 44m

11. c + 15

12. 10 -f

13. 39/e

14. k - 29

15. s - 38

16. v + 28

17. x - 11

18. y + 26

5 0
3 years ago
Read 2 more answers
A play has two different male roles, two different female roles and two different roles that can be either gender. Only a man ca
vladimir2022 [97]
5*4 for the male roles
6*5 for the female roles
after they are assigned
7*6 for the either gender
20+30+42 =92 total ways
or
20*30*42= 25200 total ways
5 0
3 years ago
Part A: If (7 to the power of 2)x = 1, what is the value of x?
andre [41]
(7^2)x = 1
49x = 1
x = 1/49

Part B
7^0 = 1

so we have 
1x = 1

x = 1
6 0
3 years ago
What is the x and y?
kykrilka [37]

Answer: x: 25

y: 19

Step-by-step explanation:

find X: 2x +10 = 180/3

2x=50

x=25

Find Y

3y+3= 60

3y = 57

y = 57/3

y= 19

3 0
3 years ago
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