Question

Sally wants to find out the volume of water needed to fill her ice-cube tray. She can't find a measuring cup, but she does have a ruler, so she measures the length, width, and depth of one of the holes in centimeters. Here is her calculation of the total volume. Label each number as exact, or not exact.

Answer 1

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

Step-by-step explanation:

We can use the picture attached below to solve this problem. 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)/(1cm^(3) )` is exact, since that is the actual accurate exchange. Next, since there are 12 cubes in a single ice tray this measurement is also exact. Lastly, since Sally's initial measurement of the cubes is not exact, then the final calculated value will also not be exact.