Respuesta :

You would first write a proportion like this:
15 over 20 = x over 16
Cross multiply 15 times 16 and 20 times x.
15 times 16 = 240. 20 times x = 20x.
Divide both sides by 20. 
240/20 = 12
x = 12
The slide tree is 12 feet tall.

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good job