Answer
(a) Q =0.2(0.995)^t
(b) 0.190
Work Step by Step
(a) Q = ab^t
a = initial amount = 0.2
b = growth factor = decreasing = 1 - 0.005 (0.5%) = 0.995
=> Q =0.2(0.995)^t
(b) Q = 0.2(0.995)^10
Q = 0.190
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