So far I used a Sales Tax Calculator and I found out the sales tax would be $7.71 cents.
I could copy the answer for prooSales Tax Calculator Enter Cost/Price:164 <span>Enter Sales Tax %:4.7 </span>Total Tax:7.71 <span>Total Cost/Price:</span>
Y = a x² + b x + c y = 0.0473809524 · 20² + 2.221428571 · 20 - 0.005952381 = = 18.95236 + 44.42875 - 0.05952381 = 63.374978 ≈ 63.4 Answer: C ) 63.4 ft.