Answer:
$270
Explanation:
To find the cost of a 9-month membership, we can use a proportion since the rate remains the same. Let's set up the proportion:
6 months membership cost / 9 months membership cost = $180 / x (unknown cost of 9 months membership)
Now, we can cross-multiply and solve for x:
6x = 180 * 9
Divide both sides by 6 to isolate x:
x = (180 * 9) / 6
x = 1620 / 6
x = 270
So, a 9-month membership would cost $270.