Working independently, tina can do a certain job in 12 hours. working independently, ann can do the same job in 9 hours. if tina works independently at the job for 8 hours and then ann works independently, how many hours will it take ann to complete the remainder of the job?

Ann would need 3 h to complete the remainder of the Job.

Step-by-step explanation:

Step 1.

The "speed" that each girl has to do the work is determined as:

Step 2.

The amount of work done by Tina in 9 hours, is obtain multiplying by the "speed" calculated in step 1:

Amount of work done= . It means that Tina completes two thirds of the work in 9 h.

Step 3.

The remaining job is calculated as . It means that still remains is one third of the job to be completed.

Step 4.

The time required for Ann to complete the job is calculated dividing the remaining of the job by the "speed" of Ann to do the job.

. It means that Ann would complete the job in another 3 hours.

0.0076, if you meant 4.125 divided by 0.03125 it would be 132

step-by-step explanation:

first you have to move the decimal in 0.03125 over until its behind the 5 which is 5 places over. now the number is 3125

then you have to move the decimal in 4.125, 5 places over. now the number is 4,112,500.

now you divide like you would normally would and get 0.0076