What is 24 pounds in ounces? What is 2 hours 9 minutes in seconds?
Understand the Problem
The image contains two multiple choice questions regarding unit conversions. The first questions asks to convert 24 pounds to ounces. The second questions asks to convert 2 hours and 9 minutes into seconds.
Answer
47. D) 384 oz 48. D) 7,740 s
Answer for screen readers
- D) 384 oz
- D) 7,740 s
Steps to Solve
- Convert pounds to ounces We know that 1 pound is equal to 16 ounces. To convert 24 pounds to ounces, we multiply 24 by 16.
$24 \text{ pounds} \times 16 \frac{\text{ounces}}{\text{pound}} = 384 \text{ ounces}$
- Convert hours to seconds There are 60 minutes in an hour and 60 seconds in a minute. So there are $60 \times 60 = 3600$ seconds in an hour. To convert 2 hours to seconds, we multiply 2 by 3600.
$2 \text{ hours} \times 3600 \frac{\text{seconds}}{\text{hour}} = 7200 \text{ seconds}$
- Convert minutes to seconds To convert 9 minutes to seconds, we multiply 9 by 60.
$9 \text{ minutes} \times 60 \frac{\text{seconds}}{\text{minute}} = 540 \text{ seconds}$
- Add up the seconds Add the seconds from the hours and the minutes to get our final answer.
$7200 \text{ seconds} + 540 \text{ seconds} = 7740 \text{ seconds}$
- D) 384 oz
- D) 7,740 s
More Information
There are 16 ounces in a pound, 60 minutes in an hour, and 60 seconds in a minute.
Tips
A common mistake is to forget the conversion factors or to multiply instead of divide (or vice versa). In the second question, a common mistake would be to not convert both hours and minutes to seconds before adding them together.
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