Pay attention, this is how to do it.
Prime factors of 14: 2*7
Prime factors of 38: 2*19
There are two 2's in both sets of prime factors, so only use one.
2*7*9=266=LCM
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Dividing each number by 2 leaves 7 and 19, which are both prime numbers. The LCM is the product of these two primes, 133 (7 x 19 = 133).
The LCM is the product of the numbers divided by their HCF
HCF(14, 38) = 2
→ LCM(14, 38) = 14 × 38 ÷ 2 = 266.
The common factors of 38 and 46 are 1 and 2.
That is not a fraction.
28.8 in the mean 14+27+30+36+38=144 144/5 (the number of units) =28.8
Assuming it is rectangle, then the perimeter equal twice the summation of length and width. Answer = 2 x (14 + 24) = 2 x 38 = 76 inches
38 hours 9¼ minutes. I think you should add 8 hours at least for sleep!