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18 May, 05:16

A foam toy is 2 inches wide. It doubles in size for every minute it is in water. Write an expression for the width of the toy after 5 minutes. What is the width after 5 minutes?

The answer is easier to find, but I don't know what the expression would be.

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  1. 18 May, 05:44
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    After 1 min ... 4

    2min ... 8

    3min ... 16

    4min ... 32

    5min ... 64

    let be w1 the initial with of the toy

    the width w after 5 minutes is w=2^6 where 6 is # minutes + 1, in our case is 5 minutes
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