Posted by jessica on Wednesday, August 19, 2009 at 9:35pm.
The upper Angel Falls, the highest waterfall on Earth, is 750m higher than Niagara Falls. If each of the falls were 7m lower, the upper Angel Falls would be 16 times as high as Niagara Falls. How high is each waterfall? Use a chart.

math  Reiny, Wednesday, August 19, 2009 at 10:30pm
let the height of NF be x m
then the height of AF is x+750
if NF were 7 m lower > x7
if AF were 7 m lower > x+7507 or x+743
then x+743 = 16(x7)
x + 743 = 16x  112
743 + 112 = 16x  x
15x = 855
x = 57
NF is 57 m high, AF is 807 m high.