In Traveling Across Flat Land,you Notice a Mountain Directly in Front

Multiple Choice

In traveling across flat land,you notice a mountain directly in front of you.Its angle of elevation (to the peak) is 3.5°.After you drive $x = 23$ miles closer to the mountain,the angle of elevation is 9°.Approximate the height of the mountain.(Round your answer upto one decimal place. ) ? ?

A) 10.3 mi
B) 2.3 mi
C) 4.3 mi
D) 8.3 mi
E) 6.3 mi