7.7.33  question   the kilopascal is a unit of measure for atmospheric pressure. suppose the atmospheric air pressure at sea level is about 9898 kilopascals. for every  1000-m increase in  altitude, the pressure decreases about 11.411.4%. what is the approximate pressure at an altitude of 40004000 m? the pressure at an altitude of 40004000 m is about   nothing kilopascals.

We know that

At sea level, the height is 0 and
the pressure is 98 kilopascals

At 1000 ft, the height is 1000 and
the pressure decreases about 11.41%

i(100%-11.41%)/100> (0.8859)

therefore
1) at 1000 ft> the pressure is 98*(0.8859)> 86.82 kilopascals
2) at 2000 ft> the pressure is 86.82*(0.8859)> 76.91 kilopascals
3) at 3000 ft> the pressure is 76.91*(0.8859)> 68.14 kilopascals
4) at 4000 ft> the pressure is 68.14*(0.8859)> 60.36 kilopascals

the answer is
The pressure at an altitude of 4000 m is about 60.36 kilopascals