Compute each percent to the nearest tenth of a percent and each dollar amount to the nearest hundredth of a dollar. a. With a discount of 80 percent, the cost of a bracelet is $17.99. What is the price before the discount? $ b. A wireless intercom system is marked down from $99.99 to $29.99. By what percent is the intercom discounted? % c. A teacher's salary in the year 2,012 is 107.5 percent of her salary in 2,011. If the salary in 2,011 is $56,593, what is the salary in 2,012? $ d. If 11 of the 28 students in a class did not enroll in the school's insurance plan, what percentage did enroll in the plan? %
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.
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