please help with second question. tables are with question.

Wake County has a special emergency rescue team. The team is practicing rescuing dummies from a smokefilled building. The first time, the team took 360 seconds ( 6 minutes). The second time, it took 270 seconds ( 4.5 minutes). Click the icon to view the learning curves table. a. The estimated learning rate is \%. (Enter your response as a whole number.) b. Suppose that the team's learning rate for the rescue exercise is 85%. The team needs to repeat the exercise times untit its time is less than 178.92 seconds. (Enter your response as a whole number.) \begin{tabular}{cccccc} \hline Unit number & \begin{tabular}{c} 70% learning \\ nb \end{tabular} & \begin{tabular}{c} 75% learning \\ nb \end{tabular} & \begin{tabular}{c} 80% learning \\ nb \end{tabular} & \begin{tabular}{c} 85% learning \\ nb \end{tabular} & \begin{tabular}{c} 90% learning \\ nb \end{tabular} \\ \hline 1 & 1.000 & 1.000 & 1.000 & 1.000 & 1.000 \\ 2 & 0.700 & 0.750 & 0.8 & 0.850 & 0.900 \\ 3 & 0.568 & 0.634 & 0.702 & 0.773 & 0.846 \\ 4 & 0.490 & 0.563 & 0.640 & 0.723 & 0.810 \\ 5 & 0.437 & 0.513 & 0.596 & 0.686 & 0.783 \\ 6 & 0.398 & 0.475 & 0.562 & 0.657 & 0.762 \\ 7 & 0.367 & 0.446 & 0.534 & 0.634 & 0.744 \\ 8 & 0.343 & 0.422 & 0.512 & 0.614 & 0.729 \\ 9 & 0.323 & 0.402 & 0.493 & 0.597 & 0.716 \\ 10 & 0.306 & 0.385 & 0.477 & 0.583 & 0.705 \\ 11 & 0.291 & 0.370 & 0.462 & 0.570 & 0.695 \\ 13 & 0.278 & 0.357 & 0.449 & 0.558 & 0.685 \\ 14 & 0.267 & 0.345 & 0.438 & 0.548 & 0.677 \\ 15 & 0.257 & 0.334 & 0.428 & 0.539 & 0.670 \\ 16 & 0.248 & 0.325 & 0.418 & 0.530 & 0.663 \\ 17 & 0.240 & 0.316 & 0.410 & 0.522 & 0.656 \\ 19 & 0.233 & 0.309 & 0.402 & 0.515 & 0.650 \\ 20 & 0.226 & 0.301 & 0.394 & 0.508 & 0.644 \\ & 0.220 & 0.295 & 0.388 & 0.501 & 0.639 \\ \hline \end{tabular} Print Done More Info