will please help me with this?

The Colorado river drops from 3200 feet at Lake Mead to 900 feet elevation at Lee's Ferry, a river distance of 270 miles. What is the gradient in degrees?

Question

will please help me with this?


The Colorado river drops from 3200 feet at Lake Mead to 900 feet elevation at Lee's Ferry, a river distance of 270 miles. What is the gradient in degrees?

anonymous · Answer

attachment

anonymous · Answer

i want / need an explanation with that one. PLEASE?

anonymous · Answer

PLEASE?

mandre · Answer

The attached pic is pretty clear. What's the problem? Did you check all the figures to make sure they are correct?

anonymous · Answer

i want to know where did 2700ft came from?
whats the role of 3200ft in that problem since it is not in used in the the PIC.?

mandre · Answer

Wait. the 2700 is wrong.
 |dw:1375877392875:dw|

anonymous · Answer

exactly, thats my point. so what is it?

anonymous · Answer

actually, it was given by this SITE http://serc.carleton.edu/mathyouneed/trigonometry/trigsp.html

mandre · Answer

3200 - 900 = 2300.
Replace the 2700 with 2300 and you should get your answer.
I don't work with miles, so is 1 mile = 5280 feet?
If so
Make hypotenuse = 270 * 5280 = 1425600
sin (x) = 2300 / 1425600
$$x = \sin ^{-1} (2300 / 1425600)$$

anonymous · Answer

o yes i got, we have the same answer. thank you :)

anonymous · Answer

i got it*

mandre · Answer

Great stuff :)