5/6, 7/18, 5/9, 2/72 a. determine the lcd of the above by inspection. lcd by inspection b. determine the lcd of the above by division of prime numbers. lcd by division of prime numbers

a. LCD by inspection:
 Write the multiples and take a consideration to 72,
  6 = 0, 6, 12, 18, 24, 30, 36, 42, 48, 54, 60, 72, 78
 18 = 0, 18, 36, 54, 72, 90
 9 = 9, 18, 27, 36, 45, 54, 63, 72, 81
 72 = 0, 72, 144,
 So if we observe the lowest common multiple is 72.
 b. LCD by division of prime numbers
 Write the factors of the denominators 6, 18, 9, 72
 6 = 2 x 3
 18 = 2 x 3 x 3
 9 = 3 x 3
 72 = 2 x 2 x 2 x 3 x 3
 The LCD = 2 x 2 x 2 x 3 x 3 = 72

29. because you will divide each number of months by 12 to find the number of years. which would mean, 5, 12.5, 16, 45, 50, 72.5. which is crazy. anyhow, i think you find the median in the middle. and yea hope your test goes good