Answer:
The proportion of exam scores that are lower than Irina's score is 0.9938
Step-by-step explanation:
<u>Data</u>
- standard deviation (sd): 6 points
- value of interest (x): 95 points
z-score is computed as follows:
z = (x - mean)/sd
z = (95 - 80)/6 = 2.5
We want to find:
P(z < 2.5)
From the table attached:
P(z < 2.5) = 0.9938
The answer is A.) 1/4(n-64) because if you distribute the 1/4 onto the parentheses it becomes n/4 - 16 which is equivalent to 1/4 - 16 if n were to equal 1.
Answer:
50,015
Step-by-step explanation:
The total of ratio units is 7+5+9 = 21. Of those at company A, that company donated 7, or 7/21 = 1/3 of the total. 1/3 × 150,045 = 50,015
Subtract the $9 from the total then divide by 2:
38-9 = 29
29/2 = 14.50
Answer: $14.50 each
