Question

Sally wants to determine the volume of water that is needed to fill her ice-cube tray. She cannot find a measuring cup, but she has a ruler, so she measures the length, the width, and the depth of one of the holes in centimeters. Her calculation of the total volume is shown. Classify each number as exact or not exact.

Answer 1

Based on the information given regarding the volume, the correct options are:

• 3.2 cm X 2.8 cm X 2.6 cm/ 1 cube - not exact
• 1 mL - exact
• 1 cm³ - exact
• 12 cubes/ 1 tray - exact

• 268.8 mL/tray - not exact

Information about the volume:

From the complete question, the first part is not exact because Sally is using a ruler to measure the cube which would have a margin of error, regardless of how small.

The 1ml is exact since that is the actual accurate exchange. Also, the fact that there are 12 cubes in a single ice tray this measurement is also exact.

In conclusion, since Sally's initial measurement of the cubes is not exact, then the final calculated value will also not be exact.

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