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1) a 2) c 3) d 4) b 5) b 6) c 7) b- i agree d is correct 8) d 9) b 10) b 11) c 12) a 13) d 14) c 15) b- i disagree with A, e.g. parameters point in, return values from functions point out, but i get what sidereal said 16) b 17) c 18) a 19) c 20) b- this one i had trouble understanding cause i...

Ok, so we have this assignment at school about retrograde motion I know what it is. It is when a star, etc. moves backwards across the sky. I know ptolemy said it had something to do with epicycles, i.e. that because the other planets were moving on circles on circles, we would see them moving...