Question

koji is cooking dinner. he has a yellow onion that weighs 0.59 pounds, and a red onion that weighs 208.65 grams. there are 453.5924 grams in a pound. which onion is heavier, and how many ounces heavier is it?
a. the red onion is 4.48 ounces heavier than the yellow onion.
b. the red onion is 7.69 ounces heavier than the yellow onion.
c. the yellow onion is 1.56 ounces heavier than the red onion.
d. the yellow onion is 2.08 ounces heavier than the red onion.

Explanation:

Convert yellow onion weight to grams

Using the Unit Conversion and Dimensional Analysis knowledge points

$$ W_{\text{yellow}} = 0.59\text{ lb} \times 453.5924\text{ g/lb} \approx 267.6195\text{ g} $$

Compare the weights of the onions

Using the Mass Units Comparison knowledge point

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Calculate the difference in grams

Using the Mass Units Comparison knowledge point

$$ \Delta W_{\text{grams}} = 267.6195\text{ g} - 208.65\text{ g} = 58.9695\text{ g} $$

Convert the difference to ounces

Using the Unit Conversion and Dimensional Analysis knowledge points

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Answer:

• (a) The red onion is 4.48 ounces heavier than the yellow onion.
• (b) The red onion is 7.69 ounces heavier than the yellow onion.
• (c) The yellow onion is 1.56 ounces heavier than the red onion.
• (d) The yellow onion is 2.08 ounces heavier than the red onion. (Correct answer)