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April 18, 2015

April 18, 2015

Posted by **Aj** on Sunday, September 16, 2012 at 10:09pm.

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**, Sunday, September 16, 2012 at 10:16pmHmmm. What is the tangent of 15 degrees? is it greater than .20?

- Math -
**Reiny**, Sunday, September 16, 2012 at 10:16pmThe 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**, Sunday, September 16, 2012 at 11:10pmIf it takes 3.7 seconds for a sound to reach the bottom of the ocean how deep is the water

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