Answer:
about 5130 feet high
Step-by-step explanation:
The tangent ratio is defined as ...
Tan = Opposite/Adjacent
Here, that means ...
tan(11°) = (rocket height)/(distance to launchpad)
rocket height = (5 mi)tan(11°)
≈ (5 mi)(0.19438) ≈ 0.9719 miles ≈ 5,132 feet
The rocket is about 5132 feet high.
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For this, we have to assume a flat earth with no atmosphere. If Dash is standing on the ground on a round earth, the horizon is about 3 miles away, so the launchpad is over the horizon.
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Of course, you know there are 5280 feet in a mile.