Question

at the grocery store, the jumbo - sized boxes of berries decreased by 20%. if the old boxes held 15 ounces of berries, how much do the new boxes hold? identify and label the point on the double number line that represents the amount of berries the old jumbo - size boxes held. the double number line has one axis labeled berries (ounces) with marks at 0 and other positions, and the other axis labeled with percentages: 0%, 20%, 40%, 60%, 80%, 100%, 120%.

Explanation:

Step1: Understand the double number line

The bottom number line is for percentage (0% to 120%), and the top is for ounces of berries. The old amount corresponds to 100% (since it's the original quantity).

Step2: Find the position of 100% on the bottom line

Looking at the bottom number line, 100% is the fifth tick mark (after 0%, 20%, 40%, 60%, 80%).

Step3: Map 100% to the top line

The top line's ticks are aligned with the bottom's. The tick corresponding to 100% on the bottom (the fifth tick) on the top line (berries in ounces) should be labeled with 15 ounces (since old boxes held 15 ounces, which is 100% of the original).

Step4: Calculate new amount (extra, for the first part)

Decrease by 20% means new amount is \(15\times(1 - 0.2)=15\times0.8 = 12\) ounces. But for the number line labeling, focus on old (100% → 15 ounces).

Answer:

For the number line labeling: The point on the top number line (berries) aligned with the 100% mark on the bottom number line (the fifth tick from the left, after 0%, 20%, 40%, 60%, 80%) should be labeled 15 ounces. For the new box amount: 12 ounces.