Texas Instruments TI-83 Plus Silver Edition Manuel utilisateur

USA TODAY Math TODAY: The New Color of Money 1

TI Technology Guide for Math TODAY version of The New

Color of Money

TI-83 Plus and TI-83 Plus Silver Edition

Converting Units of Measure Using Science Tools App

This activity utilizes the basic computation

capabilities of the handheld in decimal and scientific

notation. Use the zkey to display the screen

shown at the right. You may change to displaying

answers in scientific notation by highlighting Sci on

the top line of the screen and pressing b. You

may return to decimal notation by highlighting

Normal and pressing b.

To use the unit conversion capabilities of the

Science Tools App, press the Œkey, highlight

SciTools and press b.

On the SELECT A TOOL menu screen, select

2:UNIT CONVERTER. Notice on this screen that

there is an EXIT option on the bottom of the screen.

To exercise this option, you must press o. To exit

from within the application you will use y[QUIT]

repeatedly until this screen is displayed, then press

o.

In Step 3, select 1:LENGTH.

©

2003 Texas Instruments Incorporated

USA TODAY Math TODAY: The New Color of Money 2

Enter the number of inches high that the stack of $20

bills would be and highlight in for inches on the

screen. Then press b.

Notice that the number of inches is listed in scientific

notation with the units shown. Highlight the units of

measure to which inches are being converted—mi

for miles. Press bagain.

The height of the stack is shown in scientific notation

as miles. In this case, since the original data is

accurate to only 2 significant digits, this result should

also be expressed to 2 significant digits of

accuracy—3.5 x 102(or 350) miles.

The solution can be exported outside the App to the

handheld home screen by pressing qto select

the EXPT option from the bottom of the screen.

In Step 4, the number of cubic inches in 1 cubic foot

can be found easily. Then exit the program to find

the volume of all the $20 bills in cubic inches before

returning to the converter to find the volume in cubic

feet.

©

2003 Texas Instruments Incorporated

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19

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