Individuals, ages 19-70, should include at least 1000 mg of calcium in their daily diet. What is the minimum number of one-gram calcium supplement tablets you would need to take each day to meet this requirement if a tablet is 40% by mass calcium?
A)1
B)2
C)3
D)4

Question

Individuals, ages 19-70, should include at least 1000 mg of calcium in their daily diet.  What is the minimum number of one-gram calcium supplement tablets you would need to take each day to meet this requirement if a tablet is 40% by mass calcium?
A)1
B)2
C)3
D)4

Quizplus · Accepted Answer

Since each tablet is 40% calcium by mass, a 1-gram tablet contains 0.4 grams (400 mg) of calcium. To meet a daily requirement of 1000 mg, you would need 1000 mg / 400 mg/tablet = 2.5 tablets. Since you can't take a half tablet, you need to round up to the next whole number, which is 3 tablets.

Individuals, Ages 19-70, Should Include at Least 1000 Mg of Calcium