For more information on the 2010 census, see pages 10-11 of the March 29/April 12 issue of *MATH*.

## August 5, 2010

### That Makes Census

Posted at 10:36 AM | Permalink

### Extra Calories, Extra Cost

**ON YOUR OWN:** Now think about how much junk food you buy. If you paid 18% more for it, would you buy less?

Posted at 10:34 AM | Permalink

### He Stood and Delivered

*Stand and Deliver*(available on DVD). Escalante's death last week was a major loss for the math community, but his impact lives on.

Here is a fun trick from Escalante, just one of the ways he brought math to life. Write the numbers 1 to 10 down the side of a piece of paper. Multiply each number by 9 and write down the products so they form a column (all the ones digits and tens digits lined up). What pattern do you notice in the ones and tens digits?

Posted at 10:32 AM | Permalink

### Fearless Felix's Fast Fall!

Sometime later this year, he will jump out of a helium balloon at least 120,000 feet above Earth. He will "free fall" for about 5 minutes, then open his parachute, then take another 10 minutes to reach the ground. What will Fearless Felix's average speed be, in miles per hour, for the entire 15-minute fall? (Round to the nearest whole number.)

**ON YOUR OWN:**
Baumgartner's speed will be much faster before he opens the parachute.
Thirty seconds into the jump, he will break the speed of sound.
Research, online or in the library, how fast the speed of sound is.

Posted at 10:31 AM | Permalink

### March Madness Math!

Posted at 10:30 AM | Permalink