Category Archives: Pre-Calculus

Where was this picture taken?

Appropriate Level:  Trigonometry Background:  Here is a wonderful photograph: This picture was taken by an astronaut onboard the Apollo 17 spacecraft in 1972.  This was the last manned spaceflight to the moon and the last time someone was far enough away from … Continue reading

Posted in Pre-Calculus, Trigonometry | Leave a comment

Power of Exponential Growth

Appropriate Level:  Algebra 2 (with logarithms) The Question:  Suppose you start with an object that has the mass of a proton.  If this object doubles in mass every five minutes, how long will take for it to grow to the … Continue reading

Posted in Logarithms, Pre-Calculus | Leave a comment

Card Trick (with logarithms lurking)

Appropriate Level:  Pre-Calc and beyond The Card Trick: Ask for a volunteer, who will then pick a card from a standard 52 card deck, show it to the class, and return it to the deck in the location of his/her … Continue reading

Posted in Logarithms, Pre-Calculus | Leave a comment