Question

18. A submarine starts at the surface of the ocean and dives down 200 feet over 4hours. What was the submarine's change per hour? (7.NS.3)a. 50 feetC. 800 feetb. -50 feetd. -800 feet

Answer 1

B. -50 feet

Step-by-step explanation:

Since the submarine dives down, the distance covered = -200 feet

`\begin{gathered} \text{Rate}=\frac{\text{Distance traveled}}{\text{Time taken}} \\ =-(200)/(4) \\ =-50\text{ feet per hour} \end{gathered}`

The correct choice is B.