Please answer!! Which of the following sets represents a function?
A. {(1, 2), (3, 2), (5, 7)}
B. {(3, 5), (-1, 7), (3, 9)}
C. {(1, 2), (1, 4), (1, 6)}

The depth of a lake at a certain point, wich is a function of the distance of that point from shore, is 30 feet.

Acircle has a circumference of 7.850 units. what is its radius?

Campus rentals rents 2 and 3 bedrooms apartments for $700 ans $900 a month respectively. last month they had six vacant apartments and reported $4600 in lost rent. how many of each type of apartment were vacant?