Question

1.) Jessica went deep sea diving. She makes the first stop on her descent at 25 meters below the surface of the water. From that point she dives down further, stopping every 5 meters. If she makes 4 additional stops,which number represents her position, relative to the surface of the water?

Answer 1

`\boxed{\text{-45 m}}`

Explanation:

The surface of the water is at 0 m. Heights above the surface are positive and depths below the surface are negative.

`\begin{array}{cc}\textbf{Stop} & \textbf{Change in Depth/m} \\1 & -25 \\2 & -5 \\3 & -5 \\4 & -5 \\5 & -5 \\\text{TOTAL DEPTH =} & \mathbf{-45} \\\end{array}\\\text{Jessica's depth relative to the surface of the water is $\boxed{\textbf{-45 m}}$}`