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# WTI Extern Math 2

### WTI Extern Math Formulas

Type of Problem | Formula to Use |
---|---|

A Doctor has ordered X mg of Drug A. The available medication is A mg/ B mL. How many milliliters should the patient take? | (Ordered ÷ Available) x Available Volume |

A Doctor has ordered X mg/kg of Drug A for a patient. Patient A weighs Z lbs. What is the dose the patient will receive? | Weight in kg x Ordered Dose |

Clark's Rule | (Adult Dose x Child's weight in lbs) ÷ 150 |

Young's Rule | (Adult Dose x Child's Age in years) ÷ (Child's Age + 12) |

Fried's Rule | (Adult Dose x Child's Age in months) ÷ 150 |

A Doctor has ordered a patient to take Drug A. If the patient's BSA is Z m² and the usual Adult Dose is B mg, what is the dose the patient will receive? | (BSA x Usual Adult Dose) ÷ 1.7 |

A Doctor has ordered X mg/m² for a patient. If the patient's BSA is Z m², what is the strength that the patient should receive? | BSA x Dose (mg/m²) |

How many milliliters of Drug A would you need to make X mL of a B % solution? | Total Quantity x % Strength |

What would the % strength of a X mL solution if you added A mL of stock solution? | Active Ingredient ÷ Total Quantity |

How much solution would you have if you used A mL of stock solution to create a B % solution? | Active Ingredient ÷ % Strength |

If a doctor orders a B % solution be made from X mL of A % stock solution, what is the resulting volume? | (Quantity 1 [mL] x Concentration 1 [%]) ÷ Concentration 2 [%] |

If a doctor orders X mL of solution to made from Z mL of A% stock solution, what would the resulting % of the solution be? | (Quantity 1 [mL] x Concentration 1 [%]) ÷ Quantity 2[mL] x 100 |

Convert A °C to °F. | (°C x 1.8) + 32 |

Convert B °F to °C. | (°F-32) ÷ 1.8 |