Answer: 0.0775
Step-by-step explanation:
Given : Mean : 
Standard deviation : 
Sample size : 
Since its normal distribution , then the formula to calculate the z-score is given by :-

For x= 28.2 hours

For x= 30 hours

The P- value = 

Hence, the probabiliy that the average time spent stydying for the sampe was between 28.2 and 30 hours = 0.0775
Answer:
<em>Good Luck!</em>
Step-by-step explanation:
So the equation is 1.5(1.1) +7.6
1. Multiply 1.5* 1.1 = 1.65
2. Add 1.65 +7.6= 9.25
I would have to say the answer is 9.25
97, 19+(11+37)=19+(48)=67 and then add 30 because of 19 and 11 and you get 97