Charlie is standing 200 feet from the base of a tall building. If he determines that the angle of elevation from the ground to the top
of the building is 57°, how tall is the building?

What is the best reason for jacinta to have a savings account in addition to a checking account

Kayla and alberto are selling fruit for a school fundraiser. customers can buy small boxes of grapefruit and large boxes of grapefruit. kayla sold 3 small boxes of grapefruit and 1 large box of grapefruit for a total of $65. alberto sold 1 small box of grapefruit and 1 large box of grapefruit for a total of $55. what is the cost each of one small box of grapefruit and one large box of grapefruit?

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?