A certain culture of the Strep bacterium initially has 10 bacteria

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1. A certain culture of the Strep bacterium initially has 10 bacteria. [n_o?represents initial amount] a) Find the exponential model ????(????) = n_o 2 ^2t⁄3 for the number of bacteria in the culture after t hours. _________________________ b) Estimate the number of bacteria after 1 day. ____________ c) After how many hours will the bacteria count reach 10,000? _
2. Expand: ????????????(AB²/C)
3.  Find all the rational zeros of 4????³ − 7???? + 3
4. Find a polynomial of degree 5 with zeros 3, 2, −5, ???????????? − ????. [You may leave in factored form as linear and irreducible quadratic factors.] 
5.  List all the possible rational zeros of 4????⁴ − 5????³ + ????² − 9. [Do not actually find the zeros.]