- If 473 is to 521.5, then 500 is to ?

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What's the cosine and sine of 10 degrees in a fraction ? Does e to the negative infinity power diverge or converge? The joint distribution of the random variables If energy in the equation of E=mC^2 relates to a mass,how does a magnetic mass relate to light speed? Given a 12-question true-false quiz, what is the probability of answering exactly 5 of the questions correctly by guessing?