Which best describes the error in solving the inequality?

STEP 2:Correct the error.

2-digit numbers less than 91 which are 1 less than a multiple of 10

The revenue each season from tickets at the theme park is represented by t(c)=5x. the cost to pay the employees each season is represented by r(x)=(1.5)^x. examine the graph of the combined function for total profit and estimate the profit after four seasons

With number 11 ( show how you got the answer)