Which of the following relations is a function? a.{ (-2, 4), (-1, 3), (5, 2), (1, 4) } b.{ (1, 7), (1, 8), (2, 7), (3, 8) } c.{ (2, 4), (4, 6), (4, 8), (6, 4) } d.{ (5, 7), (6, 3), (8, 6), (5, 4) }

Find the maximum value of p= 4x + 5y subject to the following constraints :

The length of an intercepted arc of a central angle of a circle is 4 cm. if the radius of the circle is 5 cm what is the measurement of the central angle to the nearest whole degree

Sally deposited money into a savings account paying 4% simple interest per year. the first year, she earned $75 in interest. how much interest will she earn during the following year? show your work and explain your reasoning in the space provided below.