Final answer:
The proportion for 6/25 = d/30 is found by cross-multiplying and solving for d. The value of d is 7.2.
Step-by-step explanation:
To find the proportion for 6/25 = d/30, we can cross-multiply and solve for d.
First, cross-multiply: 6 × 30 = 25 × d.
Simplifying, we get: 180 = 25d.
To solve for d, divide both sides by 25: d = 180/25 = 7.2.
Therefore, the value of d is 7.2. So, the answer is A) d = 7.2.