No she can't spend $4.39 for each sandwich because if you divide 20 by 5 your quotient will be 4.
0.05 simple. Move the spaces to the left as the number of 0 in the decimal. Two 00 so move two space to the left.

There's no division by zero, so x can't be a value which x - 6 = 0
x - 6 ≠ 0
x ≠ 6
FORMULA:
- Volume of cylinder = πr²h
ANSWER:
Volume of cylindrical block = 3.14 × (5.7)² × 10.7