Question

A bottle of the medicine contains 0.5 kilograms of the medicine. One dose of the medicine is 20 grams for a child and 45 grams for an adult. The number of grams used can be calculated with the formula 20C + 45A, where A is the number of adult doses and C is the number of child doses. If a medical assistant needs to give a dose of the medicine to 12 adults and 10 children, will there be enough medicine in the bottle? If not, how many more grams will be needed?

Answer 1

The number of grams is calculated by the formula

20C +45A

, where C is number of child doses and A is number of adult doses

Now it says

medical assistant needs to give a dose of the medicine to 12 adults and 10 children

It means we plug C= 10 and A= 12

20(10) +45(12) = 200+540 = 740 grams

change it to kilograms we get

0.74 kilograms

Now doctor needs 0.74 kilograms , but the bottle contains only 0.50 kilograms

So it means It will not be enough and

0.74-0.50 = 0.24 grams

0.24 more grams will be needed