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20 September, 07:05

In 2017, the world's population was 7.451 billion people. Tge world growth rate is 1.13% annually, (a) what the projected world's population in 2035? (b) how long will it take for world's population to double? (c) how long will it take for world's population to triple?

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  1. 20 September, 07:09
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    A) Period 19 Years (if it started the 1st Jan 2017 & ended the 31st Dec 2035)

    A=P (1+r%) ^n

    A=7.451 (1+1.13%) ^19 = 9.259 Billion

    b) 14.902 = 7.451 (1+1.13%) ^n

    You will find n≈20 year (through log)

    c) to triple 22.353=7.451 (1+1.13%) ^n, Same logique
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