Algebra-1

1. Use the formula for exponential decay:

The formula to calculate the value of an asset after  years with a depreciation rate  (expressed as a decimal) starting from an initial value  is .

 

In this case:

The initial value  of the smartphone is $.

The depreciation rate  is , which in decimal form is .

The number of years  is .

 

2. Substitute the values into the formula:

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