Yup! You got it so far! Keep it up! <3
Answer:
D
Step-by-step explanation:
Brainliest?
If I am correct, it is 36 because its b x h x l x 1/2
= 0.3133
Given: μ = 560
σ = 90
To find: P (490 < X < 560)
Normal distributions are symmetric, unimodal, and asymptotic. A normal distribution is determined by two parameters the mean and the variance. A normal distribution with a mean of 0 and a standard deviation of 1 is called a standard normal distribution. It's always easy to solve questions in terms to standard normal
Hence, converting normal distribution to standard normal gives:
P(490 < X < 560) =
≤ ![\frac{X-\mu}{\sigma} < \frac{640-560}{90})](https://tex.z-dn.net/?f=%5Cfrac%7BX-%5Cmu%7D%7B%5Csigma%7D%20%3C%20%5Cfrac%7B640-560%7D%7B90%7D%29)
= P(0 ≤ Z < 0.888)
= P (z<0.89) - P(z ≤ 0)
Using standard normal table,
= 0.8133 - 0.5
P(490 < X < 560) = 0.3133
To learn more about Normal Distribution, visit:
brainly.com/question/4079902
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Answer: the percent value-added time for this ride is 16.67%
Step-by-step explanation:
Given that;
Waiting time for Vera = 35 minutes
Length of Vera's ride = 7 minutes
total processed time will; ( 35 + 7 ) = 42 minutes
the percent value-added time for this ride = ?
so
Percentage value-added time of Vera will be
= (length of the ride / total process time) × 100
we substitute
⇒ (7 / 42) × 100
⇒ 0.16666 × 100
⇒ 16.67%
Therefore the percent value-added time for this ride is 16.67%