## steffanie_0831 2 years ago Find the annual percent increase or decrease that y = 0.35(2.3)x models. (1 point) A.230% increase B.130% increase C.30% decrease D.65% decrease

1. steffanie_0831

@hartnn help? lol

2. hartnn

u said that was last Question! lol :"P

3. hartnn

i was just kidding....

4. steffanie_0831

lol i know sorry but then i just wanted to get this outta the way. I only have 4 questions this time i promise

5. hartnn

If x measures time (in years) then the value of y this year is 0.35·2.3^x, and next year it's 0.35·2.3^(x+1) so, can u calculate annual increase from this ?

6. steffanie_0831

7. hartnn

sorry, that i cannot. its against CoC here.

8. hartnn

u just subtract 0.35·2.3^x from 0.35·2.3^(x+1)

9. steffanie_0831

-_-

10. hartnn

its not difficult really.....

11. steffanie_0831

is that a x sign in between 0.35 and the 2.3^x ?

12. hartnn

and i believe the Question is \(y=0.35 (0.23)^x\) right ? and yes.

13. hartnn

\(\% increase=(final-initial)*100/initial \) here, initial is =0.35·2.3^x final =0.35·2.3^(x+1)

14. hartnn

just plug in values, and u get the answer easily.

15. steffanie_0831

i got it thanks. sorry i got that one an then just started doing the other ones. thank you

16. hartnn

what u got it as ?

17. hartnn

so that i can verify..

18. steffanie_0831

130

19. steffanie_0831

b

20. LogicalApple

130% is correct in this instance. Consider the percent increase from 0.35(2.3)^1 to 0.35(2.3)^2

21. hartnn

yes, its correct

22. LogicalApple

For growth functions, the easiest way to determine the growth rate is to consider it of the form: y = a(1 + r)^x, where r is the percent increase