Choose the One Alternative That Best Completes the Statement or Answers

Choose the one alternative that best completes the statement or answers the question.
-A mechanic is testing the cooling system of a boat engine. He measures the engine's temperature over time. Use a graphing utility to fit a logistic function to the data. What is the carrying capacity of the cooling system?
$\begin{array}{l|lllll}\text { time, min } & 5 & 10 & 15 & 20 & 25 \\\hline \text { temperature, }{ }^{\circ} \mathrm{F} & 100 & 180 & 270 & 300 & 305\end{array}$

A) $y = \frac { 306.53 } { 1 + 7.92 e ^ { - 0.254 x } } , 307 ^ { \circ } \mathrm { F }$
B) $\mathrm { y } = \frac { 311.63 } { 1 + 8.1 \mathrm { e } ^ { - 0.253 \mathrm { x } } } , 312 ^ { \circ } \mathrm { F }$
C) $\mathrm { y } = \frac { 314.79 } { 1 + 7.86 \mathrm { e } ^ { - 1.22 \mathrm { x } } } , 315 ^ { \circ } \mathrm { F }$
D) $\mathrm { y } = \frac { 314.79 } { 1 + 7.86 \mathrm { e } ^ { - 0.246 \mathrm { x } } } , 315 ^ { \circ } \mathrm { F }$