A3-d printer was purchased for $20,000 and had a value of $12,000 after 2 years of use. assuming that the value is decreasing exponentially, find the value of the printer after 4 years of use. (round your answer to the nearest dollar.)

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.!