Find change or loss
1/3 to 1/9
make denom 9
1/3 times 3/3=3/9
from 3/9 to 1/9 is change of 2/9
so, 240 was removed
240=2/9 of the bank
times both sides by 9/2
2160/2=18/18 of the bank
1080=bank
can hold 1080 pennies
.30 increase so it'd be 1.80
they earned 80 dollars more in september
Sep-360
Oct.280
This is a quadratic equation because it has degree 2.
As known as a parabola