Question

The sales at a particular bookstore grew from $2006 million in 2000 to $3803 million in 2005. Find an exponential function to model the sales as a function of years since 2000. Give your answer using the form B = Boat.

Answer 1

\[B=B_oa^t\]

Answer 2

yea use the formula

Answer 3

\[B_o=2006\]

Answer 4

but how do i find a?

Answer 5

t=0 corresponds to 2000 then t=? for 2005

Answer 6

5

Answer 7

yes then u have
\[ \large 3803=B_0a^5=2006\cdot a^5 \]

Answer 8

3806/2006=a^5

Answer 9

how do i find a after this?

Answer 10

log?

Answer 11

yes

Answer 12

idk how

Answer 13

\[\log(3806/2006)=\log(a)*5\]

Answer 14

can I cancel the logs?

Answer 15

no. u just put them. divide by 5

Answer 16

how?

Answer 17

\[(\log(3806/2006))/(\log(a))=5\]

Answer 18

no

Answer 19

I dont know what to do

Answer 20

\[ \large \log(3806/2006)=5\log a \]
\[ \large \frac{\log(3806/2006)}{5}=\log a \]

Answer 21

then
\[ \large \log a=\log(3806/2006)^{1/5} \]

Answer 22

got it??

Answer 23

ummm i think so

Answer 24

but whats a?

Answer 25

i need to find a

Answer 26

sorry. now u can cancel the logs

Answer 27

\[ \large a=(3806/2006)^{1/5} \]

Answer 28

got it??
(Megan Fox)

Answer 29

yes

Answer 30

thats not the right answer :/

Answer 31

i need to find the right a

Answer 32

"a"

Answer 33

what do you get for a? i got 1.136

Answer 34

that answer for "a" is wrong and i dont know why

Answer 35

i need an exact answer

Answer 36

but its wrong