I need a full explanation on - (i^2)

I know it equals 1, but how?

A man looks up at the top of a tree. The angle of elevation is 42°. If the tree is 20 feet tall, which of the following best represents the distance from the base of the tree to where the man is standing? A. 18.6 ft B. 20.4 ft C. 22.2 ft D. 24.6 ft

Triangle MNO is similar to triangle RPO. Triangle M N O. Side M N is 20 kilometers and side M O is 32 kilometers. Triangle R P O. Side O R is 48 kilometers. Valek finds the distance between P and R. His work is shown below.

The French club is sponsoring a bake sale. if their goal is to raise at least $140, how many pastries must they sell at $3.50 each in order to meet that goal? Write and solve an inequality

A vat containing 10,000 gallons of black ink supplies 3 different printing presses. Press 1 uses 12 gallons per minute, press 2 uses 10 gallons per minute and press 3 uses 15 gallons per minute.

Maria spent half of her weekly allowance buying pizza. To earn more money her parents let her mow the lawn for $9. What is her weekly allowance if she ended with $13?

What is they ratio of students in 6th grade if there are 20 6th graders and 24 students in 5th grade

Travis runs an average of 25 miles per week give or take six miles. let m be the number of miles travis runs each week

A restaurant uses C cups of flour for baking rolls and 12 cups of flour for baking pies each day you said distributed property to write and simplify an expression for how much flour the restaurant uses in seven days

A solid oblique pyramid has a square base with an edge length of 2 cm. Angle BAC measures 45°. What is the volume of the pyramid? 2.4 cm3 3.6 cm3 4.8 cm3 7.2 cm3

The equation 5m = 36.25 models a constant rate situation. Drag and drop the value of 7m in the box. 7m =