If i can get some sort of explanation so i understand thx

Identify a1 and r for the geometric sequence an= -256(-1/4) n-1

How do you find principle and simple interest

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.!