What is the approximate diameter of an inflated

basketball?

(1) 2 * 10^-2 m (3) 2 * 10^0 m

(2) 2 * 10^-1 m (4) 2 * 10^1 m

Well let's convert all these values out of standard form first:

2x10^-2 = 2x0.01 = 0.02m = 2cm

2x10^0m = 2x1 = 2m

2x10^-1m = 2x0.1 = 0.2m = 20cm

2x10^1m = 2x10 = 20m

Based on that, we know that 20cm is roughly equivalent to a basketball (at least it's closer than all the other values), so the answer is therefore 2 - 2x10^-1m