What is 0.8 and 80% as unreduced fractions

What is 32+4 x (16 x 1/2) -2 show your work}

How many $20 bills do you need to have to make $280

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.!