```   "U.S. consumers will spend \$8.55 billion on Web content
such as games, music and dating in 2010, up 13 percent
from this year, according to Forrester Research Inc."

"Spending for online content in the U.S. will increase 9.3
percent a year on average through 2013, reaching \$10.8
billion." -- Forrester Research Inc.
```

##### Exercises
1. `13%` written as a fraction is `____/____`.

2. `13%` written as a decimal number is `____/____`.

3. `8.55 billion` increased to `10.8 billion` is a `_______%` increase.

4. `8.55 billion` written in scientific notation is `____________________`.

5. U.S. consumers spent `\$___________________` on Web content in 2009.

6. `[algebra]` Define an exponential function `S(t)` that models the growth of U.S. spending for online content from 2010 through 2013. Use `\$8.55 billion` as an initial value; a growth rate of `9.3%`; and let `t = 0` represent the year 2010. `S(t) = _____________`

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 21 December 2009