When I was learning how to drive, I was told that while driving on the freeway I should stay one car length behind the car in front of me for every 10 miles per hour that I’m going. I complained to my dad that this was hard to estimate, so he gave me an easier rule: just stay 3 seconds behind the car in front of me. Assuming that a car length is 20 feet and I am traveling 55 miles per hour, how many car lengths behind would I be staying, using Dad’s 3-second rule?
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.
When I was learning how to drive, I was told that while driving on the freeway I should stay one car length behind the car in front of me for every 10 miles per hour that I’m going. I complained to my dad that this was hard to estimate, so he gave me an easier rule: just stay 3 seconds behind the car in front of me. Assuming that a car length is 20 feet and I am traveling 55 miles per hour, how many car lengths behind would I be staying, using Dad’s 3-second rule?
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