6. A student needs at least seven hours of sleep each night. The student goes to bed at 11:00 pm and wakes up before 6:30 am. a.
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Circumference of a circle is the diameter times 3.14
And we have a diameter of 30 cm
So the circumference = 30 * 3.14 = 94.2 cm
And we have a diameter of 30 cm
So the circumference = 30 * 3.14 = 94.2 cm
I hope that helps!