Question 429609
You are told that there are {{{80 * 0.20 = 16}}} quarters. That means there is at least $4 worth of quarters in the bank. 
So how many other coins are in the bank? {{{80 - 16 = 64}}}
And what is the smallest monetary value in a US coin? A penny is worth 1 cent.
So, the smallest amount of money is $4 plus 64 cents. ${{{4.64}}}