Algebra
Exponential Functions
\[\large \color{brown}5^{55} + \color{brown}5^{55} + \color{brown}5^{55} + \color{brown}5^{55} +\color{brown} 5^{55} = \ ? \]
by
Anuj Shikarkhane
A scientist has a jar of bacteria which double every minute. After one hour, she sees that the jar is full of bacteria. After how many minutes was the jar half full?
by
Jay Steller
\[ \large \frac {\color{red}6^{\color{blue}{2007}} - \color{red}6^{\color{blue}{2006}}}{\color{green}{30}} = \ ? \]
by
Margaret Zheng
\[\large 2^x=\dfrac{1}{2^y}, \quad\quad\quad x + y = \ ? \]
by
Trevor Arashiro
\[ \large 7^{x+1} + 7^{x-1} = 50, \ \ \ \ \ x = \ ? \]
by
vaibhav kandwal