Answer: 5/7
Step-by-step explanation:please see attachment for explanation.
Answer:
4830 lbf
Step-by-step explanation:
mass of the roommate = 150 lbm
here lbm means pound
hence the mass of the roommate = 150 pounds
we know that lbf = lbm×32.2 ( value of g in British unit 32.2 ft/s^2)
lbf= 150×32.2= 4830 lbf
hence the weight of the roommate = 4830 lbf
Answer:
x = 5 and x = - 5
Step-by-step explanation:
Given
x² - 25 = 0 ← x² - 25 is a difference of squares and factors as
(x - 5)(x + 5) = 0
Equate each factor to zero and solve for x
x - 5 = 0 ⇒ x = 5
x + 5 = 0 ⇒ x = - 5
Answer:
Step-by-step explanation:
Previous concepts
Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".
The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".
Let X the random variable who represent the exam scores for the population, and for this case we know the distribution for X is given by:
Where and
And let represent the sample mean, the distribution for the sample mean is given by:
What is the probability that a randomly selected score will be between 69 and 77?
For this case we can use the z score formula given by:
And that correspond with the 35.75% of the data.