Answer:
5
Step-by-step explanation:
0.004 x 5 = 0.02
0.02 x 5 = 0.1
0.02 x 5 = 0.5
We need a whole number that is not a decimal because if you used a decimal the number would be decreasing, not increasing, we also don't use 20 because 20 x 0.004 = 0.08 and thats not the answer, but if you multiply each by five then as referred to the equations above you get the correct solution.
