Answer:
, 
Step-by-step explanation:
The total area of the pool and the walkway is:




The roots of the second-order polynomial is:
and 
The only possible root is:

The other dimension of the pool is:



4.8 takeaway 1.2 equals 3.6
I believe the answer is the fourth option....because 13 × 3 is 39 5 × 3 is 15 and 12 × 3 is 36
A) The situation represents an arithmetic sequence because the successive y-values have a common difference of 210.
F(1) = 240 +210
F(2) = 240 +2(210)
F(3) = 240+3(210)
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F(x)= 240 +210x.
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