Drug in the Bloodstream Suppose a 400-milligramdose of heart medicine is taken daily. During each24-hour period, the body eliminates 40% of the drug(so that 60% remains in the body). Thus, the amountof drug in the body just after the 21 doses, over21 days, is given by400 + 400(0.6) + 400(0.6) 2 + 400(0.6) 3 + ...................+ 400(0.6) 19 + 400(0.6) 20Find the level of the drug in the bloodstream at thistime.
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.
Drug in the Bloodstream Suppose a 400-milligram
dose of heart medicine is taken daily. During each
24-hour period, the body eliminates 40% of the drug
(so that 60% remains in the body). Thus, the amount
of drug in the body just after the 21 doses, over
21 days, is given by
400 + 400(0.6) + 400(0.6) 2 + 400(0.6) 3 + ...................
+ 400(0.6) 19 + 400(0.6) 20
Find the level of the drug in the bloodstream at this
time.
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