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If a certain vitamin pill has 400 milligrams of magnesium
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13 May 2017, 17:51
13 May 2017, 17:51
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Question Stats:
65% (00:48) correct
34% (00:36) wrong based on 82 sessions
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If a certain vitamin pill has 400 milligrams of magnesium, then how many grams of magnesium are in a bottle of 500 vitamin pills? (1 gram = 1,000 milligrams)
A. 20
B. 200
C. 2,000
D. 20,000
E. 200,000
A. 20
B. 200
C. 2,000
D. 20,000
E. 200,000
Drill 1
Question: 3
Page: 337
Question: 3
Page: 337
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Re: If a certain vitamin pill has 400 milligrams of magnesium
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25 May 2017, 04:41
25 May 2017, 04:41
1
sandy wrote:
If a certain vitamin pill has 400 milligrams of magnesium, then how many grams of magnesium are in a bottle of 500 vitamin pills? (1 gram = 1,000 milligrams)
A. 20
B. 200
C. 2,000
D. 20,000
E. 200,000
A. 20
B. 200
C. 2,000
D. 20,000
E. 200,000
Drill 1
Question: 3
Page: 337
Question: 3
Page: 337
Given: ONE pill has 400 milligrams of magnesium
Let's use equivalent ratios to convert milligrams to grams.
Let's use the ratio milligrams/grams
So, 1000/1 = 400/x (where x = grams of magnesium in ONE pill)
Cross multiply to get: 1000x = 400
Divide both sides by 1000 to get: x = 400/1000 = 4/10 = 0.4
So, ONE pill has 0.4 GRAMS of magnesium
So, 500 pills will have (500)(0.4) GRAMS of magnesium
Evaluate to see that 500 pills will have 200 GRAMS of magnesium
Answer:
Show: ::
B
Cheers,
Brent
Re: If a certain vitamin pill has 400 milligrams of magnesium
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31 May 2017, 07:28
31 May 2017, 07:28
Expert Reply
Explanation
First, find that 400 milligrams × 500 pills = 200,000 milligrams total. Then, convert to grams by dividing by 1,000 to find the answer: 200 grams. When doing multiple conversions, be sure to label carefully and watch for arithmetic errors.
Hence option B is correct!
First, find that 400 milligrams × 500 pills = 200,000 milligrams total. Then, convert to grams by dividing by 1,000 to find the answer: 200 grams. When doing multiple conversions, be sure to label carefully and watch for arithmetic errors.
Hence option B is correct!
