- The distribution of-in the Galaxy was determined from observations of the 21 cm radiation.?

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How to solve like this question? Joe is 3 spots before getting to the last spot. he was to roll a three or higher. What is the probability that he will land on the last spot? Algebraically solve for x. Show all work. log2(x-3)+log2(x-1)=3? Find the area between a large loop and the enclosed small loop of the curve: r = 4 + 8 cos(3θ)? Calculate the freq. In Hz
b) An emission line for copper at 211.0 nm?