Explanation:
this is the same principle in every posted question.
I hope you understand this now.
if not please let me know what is still a "riddle" to you, so that I can explain it better.
remember, the inverse function of y = e^x is x = ln(y).
and the inverse function of y = ln(x) is x = e^y.
we want to find the value of x, where f(x) = 28.
28 = 0.48ln(x + 2) + 27
1 = 0.48ln(x + 2)
1/0.48 = ln(x + 2)
e^(1/0.48) = x + 2
x = e^(1/0.48) + 2 = 10.03119499... miles ≈ 10 miles
the pressure of 28 inches of mercury occurs about 10 miles from the eye of the hurricane.