World Production of Coal A study proposed in 1980 by researchers from the major producers and consumers of the world's coal concluded that coal could and must play an important role in fueling global economic growth over the next 20 years. Suppose that the world production of coal in 1980 was 5.5 billion metric tons. If output increased at the rate of 5.5e0.05t billion metric tons/year in year t (t = 0 corresponding to 1980), determine how much more coal was produced worldwide between 1980 and the end of the twentieth century. (Round your answer to one decimal place.)
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.
World Production of Coal
A study proposed in 1980 by researchers from the major producers and consumers of the world's coal concluded that coal could and must play an important role in fueling global economic growth over the next 20 years. Suppose that the world production of coal in 1980 was 5.5 billion metric tons. If output increased at the rate of
billion metric tons/year in year t (t = 0 corresponding to 1980), determine how much more coal was produced worldwide between 1980 and the end of the twentieth century. (Round your answer to one decimal place.)
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