This image was obtained by the Solar Dynamics Observatory on May $3$, $2013$. It shows a solar flare on the edge of the sun. There are many other active areas on the solar surface near sunspots which have a white color in this image.
The year $2013$ is called the Sunspot Maximum because in this year, the sun produces more sunspots and solar storms than any other time in its 11-year cycle. The year $2009$ was called Sunspot Minimum with the fewest number of sunspots counted during each month.
For each month in $2009$, the average number of sunspots counted was $2, 1, 1, 1, 3, 3, 4, 0, 4, 5, 4, 11$. Although sunspots have only been counted for the first 4 months of $2013$, the average monthly numbers are $63, 39, 58, 72$.
Problem 1 - What is the average number of sunspots counted in 2009 rounded to the nearest integer?
For more problems and solutions click here.
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