Final answer:
48 grams is a better estimate for the weight of a muffin, as kilograms are used for much heavier items. It's important to choose the appropriate unit of measurement for accuracy.
Step-by-step explanation:
The better estimate for the weight of a muffin would be 48 grams, as a muffin typically weighs a small fraction of a kilogram.
A kilogram is a unit of mass used to measure objects that are much heavier than a muffin, such as a bag of rice or a small child. In contrast, grams are used to measure lighter objects like individual pastries or small fruits. For example, a standard tennis ball weighs about 58 grams, which helps put the weight of the muffin in perspective. It is important for students to have a sense of scale when estimating measurements in different units to avoid errors.
As a point of reference, the textbook examples (Archer X) show measurements for pipettes and the purity of gold, where precision in milliliters and percentages are considered. Similarly, one should use an appropriate unit - grams instead of kilograms - for relatively light items like muffins (Archer W).