Answer:
Step-by-step explanation:
1 dollar = 30 cents tax + 70 cents net income
<u>The ratio of taxes to net income:</u>
Correct choice is D
I believe Murray is 22 end his mother 44
59-15=44
44÷2=22
Answer:
81.86%
Step-by-step explanation:
We have been given that final exam scores are normally distributed with a mean of 74 and a standard deviation of 6.
First of all we will find z-score using z-score formula.
Now let us find z-score for 86.
Now we will find P(-1<Z) which is probability that a random score would be greater than 68. We will find P(2>Z) which is probability that a random score would be less than 86.
Using normal distribution table we will get,
![P(-1](https://tex.z-dn.net/?f=P%28-1%3CZ%29%3D%20.15866)
We will use formula
to find the probability to find that a normal variable lies between two values.
Upon substituting our given values in above formula we will get,
![P(-1](https://tex.z-dn.net/?f=P%28-1%3CZ%3C2%29%20%3D%20P%28Z%3C2%29%20-%20P%28Z%3C-1%29)
![P(-1](https://tex.z-dn.net/?f=P%28-1%3CZ%3C2%29%20%3D%200.97725-0.15866%3D0.81859)
Upon converting 0.81859 to percentage we will get
![0.81859*100=81.859\approx 81.86](https://tex.z-dn.net/?f=0.81859%2A100%3D81.859%5Capprox%2081.86)
Therefore, 81.86% of final exam score will be between 68 and 86.