HID Headlights The new high-intensity discharge(HID) headlights containing xenon gas have anexpected life of 1500 hours. Because a completesystem costs $1000, it is hoped that these lightswill last for the life of the car. Suppose that theactual life of the lights could be 10% longer orshorter than the advertised expected life. Write aninequality that gives the range of life of these newlights.
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.
HID Headlights The new high-intensity discharge
(HID) headlights containing xenon gas have an
expected life of 1500 hours. Because a complete
system costs $1000, it is hoped that these lights
will last for the life of the car. Suppose that the
actual life of the lights could be 10% longer or
shorter than the advertised expected life. Write an
inequality that gives the range of life of these new
lights.
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