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Rainbow [258]
3 years ago
9

Pre-Calc Please help with the question highlighted in red

Mathematics
1 answer:
ololo11 [35]3 years ago
4 0
Believe it or not, this is the second version of Q is very similar to the first, even though it doesn't really look like it. We can represent the second version as a * (1 + r)^t

See the similarity between this and the first version? Thus, we can represent what is given in the problem as:
Q = a * b^t  = a * (1 + r)^t

Thus, b = 1 + r. Since b = 0.8, we can find r.
0.8 = 1 + r
r = -0.2, or r = -20%.
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