Answer:
Rose will have 2.32$ leftover. She is able to get 3 more bouncy balls.
Step-by-step explanation:
To get the cost of 12 bouncy balls - 12*0.64 = 7.68$
To get the leftover amount - 10.00-7.68 = 2.32$
To find how many more bouncy balls she could get - 2.32/0.64 = 3.625 which is then 3 bouncy balls because you cannot buy .625 of a bouncy ball.