Let the function f(x) have the form f(x)=acos(x+c). to produce a graph that matches the one shown below, what must the value of a be?

Find the ratios of the corresponding sides

$5400 is? invested, part of it at 11? % and part of it at 8? %. for a certain? year, the total yield is ? $522.00. how much was invested at each? rate?

The hockey team has been great! in 2008, they won 20% more games than in 2007 in 2009 they won 50% more games than in 2008 what was their overall percentage increase from 2007 through2008?