Taking caffeine with the decongestant phenylpropanolamine can raise blood pressure.
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the result of throwing a dice and the result of taking a card from a deck at the same time
Usually it is, yes. Of course, in some special cases the result of taking a logarithm is rational - such as taking the base-10 logarithm of 100.
A circle.
Your IQ is your intelligence quotient. You can determine your IQ by taking a certain test. :)
No. Dividing by zero is undefined. It does not result in anything.