Simplify this expression (0.4)^3

Question

A. 0.64
B. 1.2
C. 12
D. 0.064
How do you simplify this?
can any one help please?

Answer 1

0.4 ³ = ( 4 / 10 ) ³ = 4 ³ / 10 ³ = 64 / 1000 = 0.064