assume a general exponential growth/decay model. A certain population doubles every 15.75 years. How long will it take for it to triple?

Question

anonymous · Answer

a. 24.96 years 	
	b. 23.625 years 	
	c. 21.854 years 	
	d. 25.15 years

ganeshie8 · Answer

$2 = e^{15.75r}$

=>

$r = \frac{\ln2}{15.75}$ ---------(1)

since we need to find time it takes to triple :-

$3 = e^{rt}$

=>
$t = \frac{\ln 3}{r}$

substitute r value above and see what u get

perl · Answer

|dw:1367088976893:dw|