Suppose the distance from a student's eyes to the floor is 4 feet. He stares up at the top of a tree that is 20 feet away, creating a 30 degree angle of elevation. How tall is the tree?

Suppose the distance from a student's eyes to the floor is 4 feet. He stares up at the top of a tree that is 20 feet away, creating a 30 degree angle of elevation. How tall is the tree?

The area of a regular nonagon (nine-sided polygon) is 900. Give its perimeter to the nearest whole number.

The area of a regular nonagon (nine-sided polygon) is 900. Give its perimeter to the nearest whole number.

In :

Evaluate to the nearest degree.

Given : with .

Which of the following whole numbers is closest to ?

If , what is if is between and ?

If , what is if is between and ?

In :

Evaluate to the nearest degree.

Given : with .

Which of the following whole numbers is closest to ?