Answer:
Mold b will use the least amount of wax.
Explanation:
The formula for volume is :
![v=\pi r^(2) h](https://img.qammunity.org/2019/formulas/mathematics/middle-school/hymp9joedseee89xycvowgpxr1f4ftbf6y.png)
Mold A :
r = 1 in
h = 7 in
V =
cubic inches
Mold B :
r = 1 in
h = 4 in
V =
cubic inches
Mold C :
r = 1.5 in
h = 3 in
V =
cubic inches
Mold D :
r = 2 in
h = 3 in
V =
cubic inches
Now comparing the volumes of all the molds, we can see that the volume of mold B is the least. This means it will use the least amount of wax.