Question

a doctor recommends that a patient take four 150 mg chewable tablets of calcium each day.
a) how many milligrams of calcium will the patient take in a week?
b) how many grams of calcium will the patient take in a week?

Explanation:

Step1: Calculate daily calcium intake

The patient takes 4 tablets of 150 - mg each per day. So the daily intake is $4\times150 = 600$ mg.

Step2: Calculate weekly calcium intake in milligrams

There are 7 days in a week. So the weekly intake in mg is $600\times7=4200$ mg.

Step3: Convert weekly intake from milligrams to grams

Since 1 g = 1000 mg, the weekly intake in grams is $\frac{4200}{1000}=4.2$ g.

Answer:

a) 4200 mg
b) 4.2 g