hi everyone plz help..
q: the popultion of ana island increases by 10% each year. After how many years will the original popultaion ne doubles??
2006-10-30 03:30:04 · 4 answers · asked by cathrine fields 1 in Education & Reference ➔ Homework Help
i am sorry it is" be doubled"
2006-10-30 03:37:49 · update #1
2q=q(1.1)^n
(1.1)^n=2
n log 1.1=log2
n=log2/log(1.1)
2006-10-30 03:40:28 · answer #1 · answered by raj 7 · 0⤊ 0⤋
8 years. Say the population is 100. the first year it will be 110. The second 121, third 133, forth 146, fifth 161, sixth 177, seventh 194 eighth 214. How to figure that out is put 100 into your calculator, then times it by 1.1. push enter. you don't have to do anything to figure out the second year or so on because the calculator just repeats the last action. Just hit enter and count how many times you have to hit it. Hope that helps.
2006-10-30 11:49:10 · answer #2 · answered by crystalc419 3 · 0⤊ 0⤋
Or, it multiplies by a factor of 1.1 a year. So 1.1 to what power equals or exceeds 2?
2006-10-30 11:32:49 · answer #3 · answered by Anonymous · 0⤊ 0⤋
P= current population
2P = 1.1^x P
2=1.1^x
log 2 = log 1.1^x
log 2 = xlog 1.1
x = (log 2)/(log 1.1)
Now use your calculator to get answer
2006-10-30 11:49:59 · answer #4 · answered by ironduke8159 7 · 0⤊ 0⤋