Question

snow depth d(m) in inches m minutes after storm starts. “depth at 30 min equals depth at 45 min” is. d(m) = 30; d(45) > d(30); d(30) = d(45); d(30) = m

Explanation:

The problem states "Depth at 30 min equals depth at 45 min". In function notation, the depth at 30 minutes is $D(30)$ and at 45 minutes is $D(45)$. So the mathematical representation of "depth at 30 min equals depth at 45 min" is $D(30)=D(45)$.

Answer:

The correct option is the third one: $D(30) = D(45)$