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Unformatted text preview: 0) and their business grows to 600 subscribers the next year (year 1). Write a formula for the number of subscribers, N ( t ), as a function of years in business t , assuming exponential growth. Math 111I Sec 001 Group Quiz 5 Solutions Solutions. Clearly we have that if N ( t ) = Ca t , and we know that N (0) = 400 = C , and we also see that a = 600 400 = 1 . 5 Thus we have that N ( t ) = 400(1 . 5) t . 4. Find the growth/decay factor (assuming exponential growth/decay) for a population that decreases from 11,000,000 to 9,790,000 in one year. Solutions. We have that we decreased over one time period. So the decay factor for each year is a = 11 , 000 , 000 9 , 790 , 000 = 0 . 89...
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- Fall '08