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lianna [129]
4 years ago
11

A student uses a submarine to study ocean life. She begins at sea level, which is at an elevation of 0 feet. She travels down fo

r 90 seconds at a speed of 3.5 feet per second. She then travels directly up for 30 seconds at a speed of 2.2 feet per second. After this 120-second period, how much time, in seconds, will it take for the scientist to travel back up to sea level at the submarines maximum speed of 4.8 feet per second
Mathematics
1 answer:
Greeley [361]4 years ago
3 0

Answer:

it would take the student 51.9 seconds to travel back up to sea level

Step-by-step explanation:

90(3.5) 315ft deep

30(2.2) 66 ft up

now shes 249 ft deep

249 divided by 4.8

it would take the student 51.9 seconds to travel back up to sea level

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