The dose D (in milligrams, mg) of a certain medicine for a child of mass m kg is determined by the equation D=am+b, where aand b are constants. For a child of mass 20 kg the correct dose is 115 mg, and for a child of mass 25 kg the correct dose is 137.5 mg. Determine the value of a and the value of b. Find the correct dose that should be given to a child with mass 23kg. Suggest reason(s) why the equation may not be appropriate for determining the dosage required for an adult with mass 100 kg.
Unitary Method
The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products.
Speed, Time, and Distance
Imagine you and 3 of your friends are planning to go to the playground at 6 in the evening. Your house is one mile away from the playground and one of your friends named Jim must start at 5 pm to reach the playground by walk. The other two friends are 3 miles away.
Profit and Loss
The amount earned or lost on the sale of one or more items is referred to as the profit or loss on that item.
Units and Measurements
Measurements and comparisons are the foundation of science and engineering. We, therefore, need rules that tell us how things are measured and compared. For these measurements and comparisons, we perform certain experiments, and we will need the experiments to set up the devices.
The dose D (in milligrams, mg) of a certain medicine for a child of mass m kg is determined by the equation D=am+b, where aand b are constants.
For a child of mass 20 kg the correct dose is 115 mg, and for a child of mass 25 kg the correct dose is 137.5 mg.
- Determine the value of a and the value of b.
- Find the correct dose that should be given to a child with mass 23kg.
- Suggest reason(s) why the equation may not be appropriate for determining the dosage required for an adult with mass 100 kg.
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