**The density d of an object is found by dividing the mass m of the object by its ...**

### Question

The density *d *of an object is found by dividing the mass *m *of the object by its volume *V*. Which of the following equations gives the mass *m *in terms of *d *and *V *?

### Options

The correct answer is A.

### Explanation:

Choice A is correct. The density *d* of an object can be found by dividing the mass *m* of the object by its volume *V*. Symbolically this is expressed by the equation *d* = \(\frac{m}{V}\). Solving this equation for *m* yields *m = dV*.

Choices B, C, and D are incorrect and are likely the result of errors made when translating the definition of density into an algebraic equation and errors made when solving this equation for *m*. If the equations given in choices B, C, and D are each solved for density *d*, none of the resulting equations are equivalent to *d* = \(\frac{m}{V}\).

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