A dolphin located in sea water at a temper- ature of 26°C emits a sound directed toward the bottom of the ocean 165 m below. How much time (in seconds) passes before it hears an echo? Assume the the speed of sound in sea water is 1530 m/s at this temperature. O 1.0.198692810457516 O 2.0.177777777777778 O 3. 0.17516339869281 O 4. 0.232679738562091 O 5. 0.230065359477124 6. 0.215686274509804 O 7.0.196078431372549 8. 0.219607843137255 9. 0.205228758169935 10. 0.181699346405229

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