In 2006, 74.2 million tax returns were filed electronically. This represents 108.8% increase over the year 2005. How many income tax returns were filed electronically in 2005? Round to the nearest tenth of a million.
1.088x = 74.2 million
Solve for x.
According to The Washington Post, the number of heavy smokers declined
from 12.7 million in 2005 to 6.9 million in 2014. Let x be the year since
2005, and y be the number of heavy smokers in millions. Find the equation
of the line containing the points (0, 12.7) and (9, 6.9). Use your equation to
estimate the number of heavy smokers in 2019. Round your answer to the
nearest integer.
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To find the number of income tax returns filed electronically in 2005, we need to calculate the increase from 2005 to 2006.
1. First, let's calculate the percentage increase. We know that the increase is 108.8%, which means that the number in 2006 is 108.8% of the number in 2005.
2. To find the original number, we can use the formula: original number = (new number * 100) / (100 + percentage increase).
Let's calculate the number of income tax returns filed electronically in 2005:
original number = (74.2 million * 100) / (100 + 108.8)
original number = (74.2 million * 100) / 208.8
original number ≈ 35.51 million
Therefore, approximately 35.51 million income tax returns were filed electronically in 2005.