Home Getting Started Answer Try These Think About This... Did You Know? Resources
Challenge 45: Three Squares
Figure This!
Helix can usually stay in the sun 8 minutes before being sunburned. Using a sun tan lotion product with SPF (Sun Protection Factor) 10 means that he can stay in the sun 8x10, or 80 minutes before
being burned. Helix put SPF 10 lotion on five
minutes after he got to the beach. An hour later, he is burned. Why?
Need A Hint?
Citizens need to understand what numbers represent in situations in their daily lives. Understanding such numerical values as SPF, the category of a hurricane, and eleictrical wiring codes is important for making informed choics.

Google Classroom Google Classroom logo or Canvas Canvas Logo

Powered by ASSISTments

HomeGetting StartedAnswerTry TheseThink About ThisDid You Know?Resources
Try Another ChallengeChallenge IndexMath Index · Printing the ChallengesEn Español
Family CornerTeacher CornerAbout Figure This!
©2004 National Council of Teachers of Mathematics
Web site and CD-ROM design/production
© 1999-2004 KnowNet Construction, Inc.