Simplify the expression.
(7-2)^2
4+3^4-10

Olivia uses the work below to determine 55% of 720 which explains the error in olivia’s solution

22. catie is starting a babysitting business. she spent $26 to make signs to advertise. she charges an initial fee of $5 and then $3 for each hour of service. write and solve an inequality to find the number of hours she will have to babysit to make a profit. interpret the solution.!

Can someone show me step by step how to do this?