A set of data is described as: The data is around 7. If another measurement were taken it would probably be around 7.

Which group of measures would lead to this conclusion?

A. Range—10
Mode—7
Median—9
Mean—5

B. Range—4
Mode—6
Median—7
Mean—8

C. Range—12
Mode—9
Median—9
Mean—9

D. Range—5
Mode—9
Median—9
Mean—7

Amass weighing 16 pounds stretches a spring 8/3 feet. the mass is initially released from rest from a point 2 feet below the equilibrium position, and the subsequent motion takes place in a medium that offers a damping force that is numerically equal to 1/2 the instantaneous velocity. find the equation of motion if the mass is driven by an external force equal to f(t)=cos(2t).