Algebra-1

1. Use the formula for exponential decay:

The formula to calculate the value of a quantity after  time periods with a decay rate  (expressed as a decimal) starting from an initial value  is .

In this case:

The initial height  of the plant is  cm.

The decay rate  is , which in decimal form is .

The number of weeks  is .

2. Substitute the values into the formula:

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