You are walking along a beach and your toe hits something hard. You reach down, grab onto a handle, and pull out a lamp! It is sandy. You start to brush it off with your towel. Poof! A genie appears. He tells you, "Thank you for freeing me from that bottle! I was getting claustrophobic. You can choose one of these purses as a reward. Regardless which purse you choose, you will only be able to take it after 3 weeks." Purse A which contains $1,000 today. If you leave it alone, it will contain $1,500 tomorrow (by magic). The next day, it will have $2,000. This pattern of $500 additional dollars per day will continue for 3 weeks. Purse B which contains 1 dime today. Leave that dime in there, because tomorrow it will (magically) turn into 2 dimes. The next day, there will be 4 dimes. The amount in the purse will continue to double each day for 3 weeks. O $11,500,000 $11,500 $125,00 $213,456
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.
Consider the problem described below. After 3 weeks ( 21 days), how money is there in Purse A?
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