the change in elevation is -0.73 miles (the negative sign is because the new elevation is smaller than the initial one).
How to find the change in elevation?
To do this, we can think on the situation as a right triangle, where the hypotenuse is 4 miles, the angle that we look at measures 10.5°, and the change in elevation (let's call it x) will be the opposite cathetus to that angle.
Then we can use the relation:
Sin(a) = (opposite cathetus)/(hypotenuse)
Replacing what we know, we get:
sin(10.5°) = x/4mi
x = sin(10.5°)*4mi = 0.73mi
So the change in elevation is -0.73 miles (the negative sign is because the new elevation is smaller than the initial one).
If you want to learn more about right triangles:
https://brainly.com/question/2217700
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