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The number of cars sold weekly by a new automobile dealership grows according to a linear growth model. The first week the dealership sold eight cars \( \left(P_{0}=8\right) \). The second week the dealership sold cars \( \left(P_{1}=15\right) \).
Write the recursive formula for the number of cars sold, \( P_{n} \), in the \( (n+1)^{\text {th }} \) week.
\[
P_{n}=P_{n-1}+7
\]
Write the explicit formula for the number of cars sold, \( P_{n} \), in the \( (n+1)^{\text {th }} \) week.
\[
P_{n}=
\]
If this trend continues, how many cars will be sold in the sixth week?
cars

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