1. At a point on the ground 50 feet from the base of a tree, the angle of elevation to the top of the tree is 48°. Find the height of the tree. 2. A ladder is leaning against a wall. The foot of the ladder is 6.5 feet from the wall. If the ladder needs to reach a height of 10 feet what would the angle of elevation need to be?

Q: Help on #4 please.

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Percentage

A percentage is a number indicated as a fraction of 100. It is a dimensionless number often expressed using the symbol %.

Algebraic Expressions

In mathematics, an algebraic expression consists of constant(s), variable(s), and mathematical operators. It is made up of terms.

Numbers

Numbers are some measures used for counting. They can be compared one with another to know its position in the number line and determine which one is greater or lesser than the other.

Subtraction

Before we begin to understand the subtraction of algebraic expressions, we need to list out a few things that form the basis of algebra.

Addition

Before we begin to understand the addition of algebraic expressions, we need to list out a few things that form the basis of algebra.