Try this option:
1) if csc(u)=9, then 1/sin(u)=9 and sin(u)=1/9;
2) if sin(u)=1/9, then cos(u):
3)
So this is integers. What you are going to do is 54 - - 34 which equals positive 20 because 54 is higher than 34 which is negative, and 54 is positive. So the answer is going to be 20$.
What units are the numbers? Assume they are in millimeters (i am just assuming).
<span>Then the IQR is 7 millimeters and the range is 12 millimeters. </span>
<span>If they haven't given any units in your questions, you cannot write the answer using units.
i hope this answers your question</span>