Answer:
Time taken by the submarine to reach the cave is 10 seconds.
Step-by-step explanation:
We are given that,
The elevation of the underwater cave = -120 feet.
The rate at which the submarine descends to the cave = -12 feet per second
Thus, we have,
The time taken by the submarine to reach the cave =
= 10 seconds.
Hence, the time taken by the submarine to reach the cave is 10 seconds.
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Given expression 3² × 3⁻⁵
We will apply the power rule

3² × 3⁻⁵ = 3²⁺⁽⁻⁵⁾ = 3²⁻⁵ = 3⁻³
We will then apply the power rule

3⁻³ =

Final answer: