Answer: 2.28 %
Step-by-step explanation:
Given : Mean : 
Standard deviation :
The formula to calculate the z-score :-

For x = 72

The p-value = 

In percent, 
Hence, the percentage of pediatricians work more than 72 h per week = 2.28 %
Answer:
23
Step-by-step explanation:
To calculate mean, add numbers and divide by amount of numbers
30 + 28 + 8 + 26 = 92
92/4 = 23
Answer:
Translate right 7 units (x+7)
Reflect over x-axis (-y) and translate down 6 units (-y - 6)
Answer:
Surface area is 72
The surface area unit is square centimeters, or 
Hope this helps!