Leland got stung by a bee at a picnic. He took a 50 milligram dose of medicine to help relieve the swelling and itching. The medicine has a half-life of 8 hours. He was very sleepy the rest of the day and wondered how long the medicine would stay in his system. 1. Leland learns that he will fi nally stop feeling sleepy from his medicine when there is less than 1 milligram of the medicine in his system. When will that be? Show your work. 2. What percent of medicine remains in Leland’s system after each hour? Show your work. 3. When will the medicine be completely out of Leland’s system? Explain your thinking.
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.
Leland got stung by a bee at a picnic. He took a 50 milligram dose of medicine to help relieve the
swelling and itching. The medicine has a half-life of 8 hours. He was very sleepy the rest of the day
and wondered how long the medicine would stay in his system.
1. Leland learns that he will fi nally stop feeling sleepy from his medicine when there is less than 1
milligram of the medicine in his system. When will that be? Show your work.
2. What percent of medicine remains in Leland’s system after each hour? Show your work.
3. When will the medicine be completely out of Leland’s system? Explain your thinking.
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