Kara uses 3 1/2 cups of flour to make 2 dozen cookies. How many cups of flour will she need to make 60 cookies?
1 answer:
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<h3>Answer: Bottom left corner (southwest corner)</h3>
The left endpoint is x = 4, but we don't include this endpoint because of the open hole. We use a parenthesis to indicate "don't include the endpoint"
The right endpoint is positive infinity. We always use a parenthesis with either infinity since we cannot reach infinity
The interval from 4 to infinity is written as which is like saying