The input value of 4 results in two outputs - 4 and -2. Since the same input results on more than one output, the relation cannot be a function.
The formula for area of a circle is
A = π·r²
You are given the radius.
r = 14 feet
Now all you have to do is plug that in and solve.
A = π·14²
A = π·196
A = 615.44
Your answer is 615.44 feet.
－81＝3(5－4r)
27＝－(5－4r)
27＝－5＋4r
－4r＝－5－27
－4r＝－32
r＝8
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