<em><u>ANSWER</u></em>
My answer is in the photo above
39 the 3 would be 3 tens and your 9 would be ones place.
Let’s turn 1 1/4 into a decimal. So Ruby spends 1.25 hours a day practicing. So all we have to do is multiply 1.25 times 6 days and that gives us 7.50 or 7 1/2 total hours for the week she practices piano.
The surface area is 72 ft.^2.