Answer:
What are the equations and anwsers?
Answer: 45.03%
To find the answer for this problem, you first need to find the z-score for a value of 19.25.
The z-score is the number of standard deviations from the mean.
Here is the work for our z-score:
19.25 - 20 = -0.75 / 6 = -0.125
Now, you just have to use a standard normal distribution table and look up the probability for a z-score of -0.125. I used the average of the probability for z-scores of -0.12 and -0.13 to get 45.03%.
$4.50
dollars. We first need to find the unit rate of the sale, or how much one pound costs. We do this by $9/4 and get a rate of 2.25. Then we can multiply 2.25 by 2 pounds to get $4.50