5 x 10^-6
Five times ten to the negative six
Answer:

Explanation:
[ Step One ] Remove Parenthesis: (a) = a

[ Step Two ] Multiply: 

[ Step Three ] Apply Exponent Rule 

[ Step Four ] Apply Exponent Rule: 

[
]
➤ 

The answer to your question is
0.176470588
Step-by-step explanation:
Whole numbers = Natural numbers + "0"
Integers = Whole numbers + Negative counterparts
Since the set do contains negative numbers, only Rational numbers and Integers are correct. (D)