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**please help me !!!**

these days i was doing my lab homework , but i am confused one question ,

1. Consider a candy jar, initially with 1000 candies. You walk past it once each hour. Since you don’t want anyone to notice that you’re taking candy, each time you take 10% of the candies remaining in the jar. Sketch a graph of the number of candies for a few hours.

2. How would the graph change if instead of removing 10% of the candies, you removed 20%? Sketch your new graph.

i compute them , then i got the decimal , but i think it is not correct , because the number of candies should be integer , for example , if there are 729 candies remaining in the jar , 729-729*10%= 656.1 , but i think should be 729-720*10% =657, which one is correct ? any hint for that ? how about 20% ?

the other question is if this graph is point or a line ?