Which of the following does not have the same value as 15 ^6

Aladder that is 20ft long is leaning against the side of a building. if the angle formed between the ladder and the ground is 75 degrees how far is the bottom of the from the base of the building?

Solve the inequaliy: (x^2+2)(x−2)^2(6−2x)> 0

Afurniture store is having a weekend sale and is offering a 20% discount on patio chairs and tables the sales tax on furniture is 6.25%