Question 1208169
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It might help to draw a vertical number line.
{{{drawing(400,400,-4,4,-4,4,

circle(0,3,0.05),circle(0,3,0.07),circle(0,3,0.09),circle(0,3,0.11),circle(0,1,0.05),circle(0,1,0.07),circle(0,1,0.09),circle(0,1,0.11),circle(0,-3,0.05),circle(0,-3,0.07),circle(0,-3,0.09),circle(0,-3,0.11),

line(0,3,0,-3),

locate(0+0.2,3+0.1,"P"),
locate(0+0.2,1+0.2,"Q"),
locate(0+0.2,-3+0.1,"R")
)}}}
P = top of the volcano
Q = sea level
R = base of the volcano that is underwater, i.e. below sea level


From P to Q is 1250 meters. In shorthand we can say PQ = 1250.
From P to R is 6096 meters. Shorthand would be PR = 6096.


Then, by the segment addition postulate,
PQ+QR = PR
QR = PR-PQ
QR = 6096-1250
QR = 4846
This allows us to eliminate choices C and D off the list.
But 6069-1250 = 4819 which matches with choice D. 
It's possible that your teacher/textbook might have accidentally swapped digits 6 and 9 in the number 6096 or 6069?


In the instructions we have 6096 with 9 showing up first before that other 6.
But in choice A, and hiddenly implied in choice D, it should be 6069 where the 9 is at the very end. 
I don't know if a typo had been made. If a typo was made, then which value is incorrect?


You'll have to ask your teacher for clarification. Or please review your textbook carefully to make sure you have typed the question exactly as presented.
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