Final Answer:
The value of x is 12. Option D is answer.
Step-by-step explanation:
Here's how we can find the value of x:
Convert 40% to a fraction:
40% = 40/100 = 2/5
Set up the equation:
x/30 = 2/5
Multiply both sides by 30:
x = (2/5) * 30
Calculate x:
x = 12
Therefore, the value of x is 12. Option D is answer.