Answer:
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Step-by-step explanation:
Hope this helps :)
No it is growth. If it was a fraction the the X power then it would be decay.
Just multiply by 0.15 to get the tip amount and add to your original number. This gives you 32.43
X / 90 = 100/36
36x = 9000
x = 9000/36
x = 250 feet