Graph
P=900cos(t)+8000

In a certain pentagon, the interior angles are a, b,c, d,e where a, b,c, d,e are integers strictly less than 180. ("strictly less than 180" means they are "less than and not equal to" 180.) if the median of the interior angles is 61 and there is only one mode, then what are the degree measures of all five angles?

The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?

Which number line correctly shows 0.8 + 0.3?