Pretzels are given away for free at a local store. The tray is constantly replenished as people take the pretzels. The number of pretzels in the tray is given by the function P(t) = 20 + t^2 − 8cosπt , where t is measured in minutes. When t = 1 minute, find the average rate of change of pretzels in the tray over the next 30 seconds.

Match the term on the left with its image or description on the right. match term definition diameter a) circle a and a line segment connecting points b and c which are on the circle. circumference b) circle a and a line segment connecting points b and c which are on the circle. radius c) a piece of the circumference of a circle secant d) two circles that share the same center. concentric circles e) the distance around a circle arc f) a segment between two points on a circle that passes through its center

7x+8y=-18, 4x-9y=-3 solve the system of equations

If the tip varies directly with the number of guest which equation represents between the tip, t, and the number of guest, g?