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A diver begins at 90 feet below sea level. She descends at a steady rate of 6 feet per minute for 6 minutes. Then, she ascends 20 feet. This expression shows her current depth in feet.

Negative 90 minus 6 (6) + 20

What is her current depth?
Negative 596 feet
Negative 556 feet
Negative 146 feet
Negative 106 feet

Respuesta :

Answer is negative 106 feet
Step by step
Diver is at -90
She descends at -6’ per minute x 6 minutes
So -90 and -36 = -126 ft below sea level
Now she ascends up + 20 feet
So -126 + 20 = -106 current depth
Problem solved

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