Select all simplified expressions of 3^4÷ 3^9
3^13
3^5
1/243
1/3^5
1^5

answer:

at time x=0 we have 1000, at time x=1 we have 2000, at time x=2 we have 4000.  

so that's an initial value of 1000 and a ratio of 2,

y = 1000 (2^x)

hope this !

333.74 ! should be your answer for this question

jbankston is right, use thhe link and you should find the answer.