It is given to us that the velocity of an object in meters per second varies directly with time in seconds since the object was dropped, as represented by the table (which is not given to us). The acceleration due to gravity is the constant of variation. Now, we know, from basic physics that the value of the acceleration due to gravity in the SI unit is 9.8 m/s^2. Therefore, the second option is the correct option. 
water in cylinder = 1.179π in³
<h3>Further explanation</h3>
Volume is a derivative quantity derived from the length
The unit of volume can be expressed in liters or milliliters or cubic meters
The volume of the cylinder
V = πr².h
the volume of ball
V= 4/3πr³
volume of cylinder

volume of the ball

water in the cylinder
V cylinder - V ball

54750 days / 365 (number of days in a year)
150 years
Aiden should use the unit kilogram(kg)
ab+bc>can is the correct answer