Ms. B used an app on her phone and measured the angle of elevation to the top of a mountain and found it to be 19°. She then drove 7 miles closer to the mountain and again measured the angle of elevation. Now it was 53°. Assuming she drove along a straight, flat road. What is the height of the mountain? Round your answer to the hundredths place and label appropriate units. Upload a clear photo of the work for just this problem.

(n^3 - n)

= n(n-1)(n+1)

since it is divisible by 3 and 2 ,because it is a multiple 3 consecutive number

if, n-1 is odd then n+1 is also odd, then it is a multiple of 9

but if, n-1 is even then n+1 is also even, then it is a multiple of 4

so, largest multiple = max(9*2, 4*3) = max(18, 12) = 18

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