999 because:
1) it does not contain any zeros
2) it is the largest number possible 3-digit number
3) 999 / 9 = 111
The correct answer is 3.2 x 10^-5
75 employees are 60 and over
This is calculated by multiplying the class width by the frequency density
So 10x6 and 5x3
10x6=60
5x3=15
60+15=75
I cant figure out part b though. Sorry
Hope this has helped you though