I remember being taught this but I can't remember how to solve it. Can you explain how to get the answer??

The table represents a function f(x). what is f(3)? a.-9 b.-1 c.1 d.9

How long does it take natsumi to clean up after she is done? table: .area time30. 245. 2.7560. 3.5

21 type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar. the solution set of n2 - 14n = -45 is { (separate the solutions with a comma)