I do not even know where to start with this one, can someone help?
the peak of a mountain is 19,340 ft above sea level.
what is the integer that best expresses the given number?
Rounded to one significant figure, that would be
2*10^4 feet, so perhaps the number they are looking for is 2. To make any sense of it, you also would need to know the 10^4 multiplier.
That is a rather vague and strange question.
If the altitude had been given in meters, the answer would be different