Answer:
Step-by-step explanation:
After the 440 pennies are added, the bank is 3/5 full. It started out 1/10 full, so
3/5 - 1/10 is the amount of space in the bank that the 440 pennies took up, or
1/2. Use proportions to solve this, with number of pennies on the top and the fraction of the bank that is filled on the bottom:
[tex]\frac{440}{\frac{1}{2} }=\frac{x}{1}[/tex]
where x is the number of pennies (our unknown) that it will take to fill the bank (1). Cross multiply to get
[tex]\frac{1}{2}x=440[/tex]
so x = 880
