Step-by-step explanation:
The answer is D.
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Answer:
2
2 km per trip x 2 trips = 4 km
9514 1404 393
24
The number of permutations of 4 items is 4! = 24.
math, maht, mtah, mtha, mhat, mhta,
amth, amht, atmh, athm, ahmt, ahtm,
tmah, tmha, tamh, tahm, thma, tham,
hmat, hmta, hamt, hatm, htma, htam
2 thousands, 0 hundreds, 7 tens, 9 ones