Answer :
Answer:
C. 3π
Explanation:
Let's see what is the result of multiplying 0.4 by each option:
Option A.
0.4 x √9 = 0.4 x 3 = 1.2
Option B
0.4 x 0.444... = 0.177...
Option C
0.4 x 3π = 1.2π
Option D
0.4 x 2/7 = 4/35
The only irrational number is 1.2π, so the answer is:
C. 3π
The other numbers are finite decimals or infinite decimals with repetition or fractions which are rational numbers.