Question 83648
the 11.35 is the P (which is a function of (a)), so you need to find the value of a in the equation


11.35=14.7e^(-0.21a) ... taking natural log gives, ln(11.35)=ln(14.7)-0.21a


ln(11.35)-ln(14.7)=(-0.21)a ... (ln(11.35)-ln(14.7))/(-0.21)=a ... a approximately equals 1.232 mi.