Answer:
27.5ft
Explanation:
a² + b² = c²
Plug in what you have:
a² + 12² = 30²
Get a by itself:
a² = 30² - 12²
Simplify:
a² = 900 - 144
a² = 756
√a = √756
Then you get 27.49 and when you round you get 27.5
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