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Mathematics, 13.04.2021 01:40 ElegantEmerald

The approximate rate of change in the number​ (in billions) of monthly text messages is given by the equation f prime (t )equals7.9tminus15.1 where t represents the number of years since 2000. In 2002 ​(tequals2​) there were approximately 9.4 billion monthly text messages. Complete parts a. and b. below. a. Find the function that gives the total number​ (in billions) of monthly text messages in year t.

b. According to this​ function, how many monthly text messages were there in​ 2009?

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