Write the expression (x4)8 in simplest form

Express the following as a function of a single angle, cos(60) cos(-20) - sin(60) sin(-20)

Due to financial difficulties the owner of 4 skateboard stores is going to close 2 of his stores. based on the money earned at each store, which two stores should remain open?

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?