Let's Just See How Many Times 30 Goes Into 180

Since 8 trash bags last 30 days, let's multiply

ANSWER
You'll Need 48 Trash Bags For 180 Days
I think the mean of variable a is 4
Answer:
12 / (-15) goes in the first box.
12 / 15 goes into the second box
15 / -12 goes into the third box
and 15 / 12 goes into the fourth box
Step-by-step explanation:
How long must $542 be invested at a rate of 7 percent to earn a 303.52 interest