To determine Jasmine's current elevation, we start at sea level, which is considered 0 feet.
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Jasmine swims down 8 feet below sea level: \[ 0 - 8 = -8 \text{ feet} \] Now, she is at -8 feet.
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Then, she swims back up 3 feet: \[ -8 + 3 = -5 \text{ feet} \]
So, Jasmine is now at an elevation of -5 feet. The correct response is -5.