Karri puts $1600 into an account that does not earn any interest. Every month
after that, she deposits the same amount of money. This sequence
represents her account balance for the first few months:
$1600, $1900, $2200,...
What is the explicit formula for the amount of money in her account at the
beginning of month n?

9.4.34  question   to estimate the height of a stone  figure, an observer holds a small square up to her eyes and walks backward from the figure. she stops when the bottom of the figure aligns with the bottom edge of the  square, and when the top of the figure aligns with the top edge of the square. her eye level is 1.811.81 m from the ground. she is 3.703.70 m from the figure. what is the height of the figure to the nearest hundredth of a  meter?