Final answer:
The acceleration of a box sliding down an inclined plane can be calculated using the equation acceleration =

Step-by-step explanation:
The acceleration of a box sliding down an inclined plane can be calculated using the following equation:

where g is the acceleration due to gravity, θ is the angle of the incline, and μk is the coefficient of kinetic friction between the box and the plane.
In this case, the acceleration = g * sin(30°) - 0.0300 * g * cos(30°), and g is approximately 9.8 m/s².
By plugging in the values and evaluating the equation, you can find the acceleration of the box.