Math
posted by Aj .
How do i figure out this question?
There are two roads, one has a grade of 20% the other has an elevation of 15 degrees. Which road would be steeper?

Math 
bobpursley
Hmmm. What is the tangent of 15 degrees? is it greater than .20?

Math 
Reiny
The 20% usually refers to the slope of the road.
But the slope of a line is the tangent of the angle it makes with a horizontal
so if tan Ø = ,2
Ø = 11.3°
so ...... 
Math 
tracey
If it takes 3.7 seconds for a sound to reach the bottom of the ocean how deep is the water
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