Can someone me solve this do i use sin cos or tan?

What does independent variable and dependent variable mean in math?

Amira is painting a rectangular banner 2 1/4 yards wide. the banner will have a blue background. amira has enough paint to cover 1 1/2 square yards of the wall. the school colors are blue and yellow, so amira wants to add yellow rectangles on the left and right sides of the blue rectangle. the yellow rectangles will each be 3/4 yards wide and the same height as the blue rectangle. what will be the total area of the two yellow rectangles?

In a timed typing test lara typed 63 words per minute.estimate the number of words she should be able to type in half in hour show your work