The cost of three pounds of grapes is 6.57.what is the constant or proportionality that relates the cost in dollars ,y, to the number of pounds of grapes a.6.57 b.3 c.2.19 d. not here

The motion of a weight that hangs from a spring is represented by the equation h=8sin(2pi/3t). it models the weight’s height above or below the rest position as a function of time. approximately when will the object be 3 inches above the rest position?