Question

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.

Answer 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

Answer 2

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