To find the rate of change in the whale's depth as it swims up towards the surface, we can use the formula for the rate of change, which is given by:
\[ \text{Rate of Change} = \frac{\text{Change in Depth}}{\text{Time}} \]
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Initial Depth: The whale is currently at a depth of 15 meters below the surface, which can be expressed as -15 meters (since below the surface is negative).
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Final Depth: When the whale reaches the surface, its depth is 0 meters.
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Change in Depth: \[ \text{Change in Depth} = \text{Final Depth} - \text{Initial Depth} = 0 - (-15) = 15 \text{ meters} \]
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Time Taken: The whale takes 9.5 seconds to reach the surface.
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Rate of Change Calculation: \[ \text{Rate of Change} = \frac{15 \text{ meters}}{9.5 \text{ seconds}} \approx 1.57894736842 \text{ meters per second} \]
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Rounding: When rounding to the nearest hundredth: \[ \text{Rate of Change} \approx 1.58 \text{ meters per second} \]
Thus, the quotient that best describes the rate of change in the whale's depth is 1.58 meters per second.