Answer:
- Radius=50 ft
- π=3.14
- Height=30 ft
- Volume=?
We know that,





Thus,the third option is correct.

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.
7/8 in decimal form is 0.875 because you are dividing 7 by 8