To which real number set do the following real numbers belong?

What is the best estimate for the following.

How do you find the area of a triangle?

Find the area of the triangle.

What is the measure of one interior angle of the regular polygon shown?

Lines in the same plane that never meet are called:

Mount Columbia is the highest mountain in the province of Alberta, with a peak of about 2,500 feet above sea level. Lake Toho has the lowest point at 50 feet below sea level.

What is the difference in elevation between Mount Columbia and Lake Toho?

Adonica was making snacks for her friends by putting equal amounts of trail mix into small bags. She started with $3\ \frac{4}{5}$  cups of trail mix.  She ate  $\frac{1}{5}$  of a cup of the trail mix.  Then she portioned  $\frac{3}{4}$  cup of trail mix evenly into each bag for her friends.
How many complete bags did Adonica make?