Explain what the variables in the formula represent and show all steps in the computations.

Cowling’s rule. Cowling’s rule is another function for determining the child’s dosage of a drug. For this rule, the formula

d = D(a+1)

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(expresses the child’s dosage d as a function of the adult dosage D and the child’s age a.)

a) If a doctor prescribes 1000 milligrams of acetaminophen for an adult, then how many milligrams would she prescribe for a six-year-old child using Cowling’s rule?

b) If a doctor uses Cowling’s rule to prescribe 200 milligrams of a drug to a child when she would prescribe 600 milligrams to an adult, then how old is the child?

• Explain what the variables in the formula represent and show all steps in the computations.

• Incorporate the following five math vocabulary words into your discussion. Use bold font to emphasize the words in your writing (Do not write definitions for the words; use them appropriately in sentences describing your math work.):
• Literal equation
• Formula
• Solve
• Substitute
• Conditional equation

  150-250 words in length