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How many kilograms of calcium are there in 173 pounds of calcium?

(1 pound = 454 grams; 1 kg = 1000 g)

A. 78,542 kg
B. 78,500 kg
C. 78.5 kg
D. 78,542,000 kg

Answer :

To find out how many kilograms of calcium are in 173 pounds of calcium, we need to go through a few simple steps of unit conversion.

1. Convert pounds to grams:
- We know that 1 pound is equal to 454 grams.
- So, to convert 173 pounds to grams, multiply 173 by 454:
[tex]\[
173 \text{ pounds} \times 454 \text{ grams/pound} = 78,542 \text{ grams}
\][/tex]

2. Convert grams to kilograms:
- We know that 1 kilogram is equal to 1,000 grams.
- To convert grams to kilograms, divide the number of grams by 1,000:
[tex]\[
78,542 \text{ grams} \div 1,000 \text{ grams/kg} = 78.542 \text{ kg}
\][/tex]

So, there are approximately 78.5 kilograms of calcium in 173 pounds of calcium. The closest choice in the options given is 78.5 kg.

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