D(t)=10+4.9cos(π6t) The function D defined above models the depth, in feet, of the water t hours after 12 A. M. in a certain harbor. Which of the following presents the method for finding the instantaneous rate of change of the depth of the water, in feet per hour, at 6 A. M. ?

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)

Find an equation of the line perpendicular to the graph of 28x-7y=9 that passes through the point at (4,1)

Amodel rocket is launched from a roof into a large field. the path of the rocket can be modeled by the equation y = -0.04x^2 + 8.6x + 4.8, where x is the horizontal distance, in meters, from the starting point on the roof and y is the height, in meters, of the rocket above the ground. how far horizontally from its starting point will the rocket land? a. 0.56 m b. 215.56 m c. 431.11 m d. 215.74 m