10×9×8×7×6×5×4×3×2×1=7,862,400
a,b,c,d,e,f,g,h,I,j
a,b,c,d,e,f,g,h,j,i
a,b,c,d,e,f,g,I,j,h
a,b,c,d,e,f,g,I,h,j
and so on....
odds are 1/7,862,400
The answer to the question is -343i
it is a geometric situation and the formula is the following

so after 6 hours we get
Its asking for the units being used so the answer is Inches
The answer is (4, 3). Hope this helps!