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If t = 6, then
P(t) = 0.351 +0.812 - 201 + 190
P(6) = 0.35(6) + 0.8(6)2 + 2016) + 190
P(6) = 0.35(216) + 0.8(36) + 120 +190
P(6) = 75.6 + 28.8 + 120 + 190
P(6) = 414.4
3​