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The cities of Abnarca and Bonipto have populations that are growing exponentially. In 1980, Abnarca had...

The cities of Abnarca and Bonipto have populations that are growing exponentially. In 1980, Abnarca had a population of 23,000 people. In 1990, its population was 28,000. Bonipto had a population of 35,000 in 1980. The population of Bonipto doubles every 55 years.

(a) How long does it take the population of Abnarca to double?

(b) How long will it take for Abnarca's population to equal that of Bonipto?

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