What's 70,000+70,000???

Is this a polynomial function? i need to know asap

How can (square root of 25) ^2 be rewritten?

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.!