I’m not good at math srry but hope someone answers the is for you
Answer:
a: 0.9544 9 within 8 units)
b: 0.9940
Step-by-step explanation:
We have µ = 300 and σ = 40. The sample size, n = 100.
For the sample to be within 8 units of the population mean, we would have sample values of 292 and 308, so we want to find:
P(292 < x < 308).
We need to find the z-scores that correspond to these values using the given data. See attached photo 1 for the calculation of these scores.
We have P(292 < x < 308) = 0.9544
Next we want the probability of the sample mean to be within 11 units of the population mean, so we want the values from 289 to 311. We want to find
P(289 < x < 311)
We need to find the z-scores that correspond to these values. See photo 2 for the calculation of these scores.
We have P(289 < x < 311) = 0.9940
7.62 X 10 to the -6th power goes to the third one
7.62 X 10 to the 5th power goes to the second
and 7.62 X to the -4th power goes to the fourth
and i think you have the first one right!
i really hoped this helped you
Answer:
8x^2-34x+35
Explanation:
Answer:
![\frac{7}{15}](https://tex.z-dn.net/?f=%20%5Cfrac%7B7%7D%7B15%7D%20)
Step-by-step explanation:
![\frac{7}{25} \div \frac{3}{5} = \frac{7}{25} \times \frac{5}{3} = \frac{35}{75} = \frac{7}{15}](https://tex.z-dn.net/?f=%20%5Cfrac%7B7%7D%7B25%7D%20%5Cdiv%20%20%5Cfrac%7B3%7D%7B5%7D%20%3D%20%20%5Cfrac%7B7%7D%7B25%7D%20%5Ctimes%20%20%5Cfrac%7B5%7D%7B3%7D%20%3D%20%20%5Cfrac%7B35%7D%7B75%7D%20%3D%20%20%5Cfrac%7B7%7D%7B15%7D%20)
Hope this helps ;) ❤❤❤