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28 January, 09:48

Mr. Mole left his burrow and started digging his way down.

B (t) models Mr. Mole's depth relative to the ground (in meters) after t minutes.

How far below the ground is Mr. Mole after 5 minutes?

B (t) = - 2.3t - 7

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  1. 28 January, 09:55
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    What you do is you take - 2.3t replace t with 5 multipy - 2.3 and 5 to get - 11.5 then you subtract 7 and get - 18.5
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