Algebra word problem help

The average walking speed R of people living in a city of population P,in thousands, is given by R=0.37InP+0.05, where R is in feet per second.
a.) The population of Honolulu, Hawaii is 395,790. Find the average walking speed.
b.) A city's average walking speed is 2.70 ft/sec. Find the population.

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  1. a) is just button-pushing on a calculator
    I got a rate of 4.82 ft/s

    b)
    2.7 = .37(lnP) + .05
    2.65 = .37lnP
    lnP = 2.65/.37 = 7.162162
    P = 1289.6

    P = 1290

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  2. Thank you. I was able to get the same answers.

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