Which expression, when evaluated, has a result that is a natural number?

√5 · 4

√9 - 5

√4 + () 2

√256 · 0.125

option (C) and option (D)

√4 + 2

√256 · 0.125

Step-by-step explanation:

Natural numbers are positive integers

1)

√5 · 4

4√5

as √5 is not a perfect square

2)

√9 - 5

3 - 5

-2

3)

√4 + 2

2 + 2

4

4)

√256 · 0.125

16 (0.125)

16 (125) {3 decimal places to left}

2000.0

2.0

2