Suppose the equation, y = 21(1.06)x, represents book sales in billions of dollars since 2000. X represents the number of years after 2000. The table below shows the book sales for the four years after 2000, to the nearest billion. Which year has an incorrect amount?
Years after 2000 (x)
1
2
3
4
Billions of dollars (y)
23
24
25
27

Question

Suppose the equation, y = 21(1.06)x, represents book sales in billions of dollars since 2000. X represents the number of years after 2000. The table below shows the book sales for the four years after 2000, to the nearest billion. Which year has an incorrect amount?
Years after 2000 (x)
1
2
3
4
Billions of dollars (y)
23
24
25
27

anonymous · Answer

A. 1 23
B. 2 24
C. 3 25
D. 4 27

anonymous · Answer

All you have to do is plug in the values of the equation into a calculator

anonymous · Answer

@yazthespaz for my answer U got B. 24 But I don't know if it right?

anonymous · Answer

Oh okay i will check the answer for you

anonymous · Answer

@yazthespaz thanks I did it on my sheet.

anonymous · Answer

It's actually A and i will explain why now

anonymous · Answer

Why?

anonymous · Answer

y = 21(1.06)x
 plug in A 

23 = 21(1.06)1

23 = 21(1.06) 

23 = 22.26 

You round 22.26 to 23

anonymous · Answer

Oh I understand now grazie. (:

anonymous · Answer

No problem :)