A bakery uses 63.9 kilograms of flour each hour. How many kilograms of flour will the bakery use in 18 hours?
1 answer:
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<h3>Answer: Choice C 
</h3>
The open circle means we do not include the endpoint, hence the use of a greater than symbol. If we were to include the endpoint, then we'd have greater than or equal to. We can rule out choice B due to this reasoning.
The ray pointing to the right indicates we are talking about x values larger than 5, so we can rule out choice A and conclude the answer is C.
Side note: The notation is saying "x is a real number"