Answer:
Therefore a teenager should drink 1.0093 L per day.
Explanation:
Given that,
The recommended calcium intake for teenagers is 1,300 mg per day.
A glass of milk contains 305 mg Ca.
So, 305 mg Ca is contained by 1 glass of milk.
    1  mg Ca is contained by  1/305 glass of milk.
  1300 mg Ca is contained by 1300/305 glass of milk.
                          =260/61 glass of milk.
One glass milk contains a volume of eight fluid ounce = (8×29.6) mL =236.8 mL.[∵1 fluid ounce = 29.6 m L]
∴260/61 glass of milk = (260/61)×236.8 mL.
                ≈1009.3 mL
                =(1009.3÷1000) L  [∵ 1000 mL= 1L]
                =1.0093 L
Therefore a teenager should drink 1.0093 L per day.
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