You calculate the angle of elevation of a mountain is 4 degrees and 6 miles later it is 7 degrees how tall mt?

while traveling across the flat terrain of Nevada, you notice a mountain directly in front of you. You calculate that the angle of elevation to the peak is 4 degrees, and after you drive 6 miles closer to the mountain it is 7 degrees. Approximate the height of the mountain peak above your position. Round your answer to the nearest foot.