Half of 2.4 L given in mL is 1200 mL
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After 48 minutes, two half-lives have passed for Cu-60 (24 min * 2 = 48 min). Each half-life reduces the amount of Cu-60 by half, so after 48 minutes, only 1/4 of the original 4 mg sample would remain, which is 1 mg.
24 tsp 1 cup = 48 teaspoons 1 teaspoon = 0.02 cup
1 pint = 16 fluid ounces 1.5 pints = 24 fluid ounces
There are 24 teaspoons in half a cup. 1/2 cup=4oz. 1oz=30mL. So, 4oz=120mL. 1tsp=5mL. 120mL (4oz) divided by 5mL (1 tsp) = 24 teaspoons.
A half gallon is equivalent to 64 fluid ounces.
24 ounces in a pound and a half
You can do it in your head. Cutting something in half is the same as dividing by a factor of 2. Cut 48 in half. Cut 24 in half. Cut 12 in half. Cut 6 in half. 2 x 2 x 2 x 2 x 3 = 48
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24 and a half
There are 24 half-miles in 12 miles. This is computed by: 12 / .5 = 24 half-miles.
At the end of 4 half-lives, only 1/16th (1/2^4) of the original amount of sodium-24 will remain. If you start with 100 grams, at the end of 4 half-lives, you will have 6.25 grams remaining (100 grams * 1/2^4).
24 and a half
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