Logs to be sawed into boards are first rough-cut to be abit over 8 feet long. Measurements found the actual meanlength to be 98.5 inches and 20% of the logs were longerthan 100 inches. Assuming the log lengths to be normallydistributed, approximately what percent of such logsshould be between 97 and 100 inches long?A) 20% B) 40% C) 60%D) 68% E) 80%
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.
Logs to be sawed into boards are first rough-cut to be a
bit over 8 feet long. Measurements found the actual mean
length to be 98.5 inches and 20% of the logs were longer
than 100 inches. Assuming the log lengths to be normally
distributed, approximately what percent of such logs
should be between 97 and 100 inches long?
A) 20% B) 40% C) 60%
D) 68% E) 80%
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