4
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2 x 2? 2 x 2 = 4
not much.
16 cub ft.
36
When a number is raised to a power, it is itself multiplied together the power times, eg:22 = 2 x 223 = 2 x 2 x 2so:210 = 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2= 2 x (2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2)= 2 x 29= twice 29