4. density d = m/v (solve for m) d = density m = mass v = volume

4. density d = m/v (solve for m) d = density m = mass v = volume
Answer
Explanation:
Step1: Multiply both sides by V
$D\times V=\frac{M}{V}\times V$
Step2: Simplify the right - hand side
$M = D\times V$
Answer:
$M = D\times V$