A and D
Put 3 in the equations and solve
Answer:

Step-by-step explanation:
To write this equation with h isolated, we cancel everything else on the right hand side of the equals sign. This means we cancel π and r².
Since both of these are attached to h by multiplication, we divide by both to cancel. We can divide by both at the same time:

30. You’d do 180 divided by 6 :)
Answer: measuring cups??
Step-by-step explanation: