Question 99724
First we convert miles to feet to get same units. There is 5280 feet in mile. So 15 miles is 5280*15 feet = 79200 feet. This is ratio between length and height of flight - 79200/18000. We can simplify this ratio to 22/5 (length/height).So in 22 feet plane decreases it's altitude by 5 feet. In 1 feet it decreases it's alt. by 5/22 feet.5/22 is 0.22727272... which is 0.23 rounded to nearest hundreth.