Final answer:
The general formula that describes the variation is m = kd^2/x^(1/2), where m varies directly with the square of d and inversely with the square root of x.
Step-by-step explanation:
The general formula to describe the variation is: m = kd^2/x^(1/2)
Where:
- m represents the variable that varies directly with the square of d and inversely with the square root of x.
- k is the constant of variation.
For example, if k = 3, d = 2, and x = 4, the formula would be m = 3(2)^2/4^(1/2), which simplifies to m = 6/2, resulting in m = 3.