awork: Chapters $10$ and $E$

Question $3,$ Problem E$.3$

HW Score: $8\mathrm{.}33\%,0\mathrm{.}5$ of $6$ points

Part $1$ of $2$

Points: $0$ of $1$

If Professor Laurie Macdonald takes $18$ minutes to grade the first exam and follows an $85\%$ learning curve then, using table Table E$\mathrm{.}3,$ the amount of time she requires to grade:

a$)$ the $25$ th exam minutes $($round your response to two decimal places$).$