After flying at an altitude of 9 km, an airplane starts to descend when its ground distance from the landing field is 175 km. what is the angle of depression for this portion of the flight?

We just started the introduction into circles and i have no idea how to do this.

Awasher and a dryer cost $701 combined. the washer costs $51 more than the dryer. what is the cost of the dryer?

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.