Please help!! 30 points! A discount sports store has been open for 17 years. For this time period, the store’s annual revenue, R (in millions of dollars), can be modeled by the function
(picture) where t represents the number of years since the store opened. Determine the number of years the store was in business when the revenue amount reached $8.2 million.

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  10 years

Step-by-step explanation:

We want to find the value of t when R = 8.2. Equivalently, we want to find t when ...

  0.001(-t^3 +16t^2 +900t -1400) -8.2 = 0

A graphing calculator is useful for finding real solutions to this equation. The attachment shows the store was in business 10 years when revenue reached 8.2 million.

he sells x mount because thats eqivilqant to the maz and then divided into quarters

step-by-step explanation:

1) 2/5

2) zero=0/1

3) zero=0/2

4) -4/5

5) undefined=3/0