<span>Starting with the equation f = v + at
Subtract v on both sides:
f - v = at
Divide both sides by a:
(f - v) / a = t
Swap the sides:
t = (f - v) / a

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20 102.3 rounded down is 100 4.7 rounded up is 5. 100 divided by 5 equals 20, as 5 times 20 equals 100.
No. 16.454 contains an extra digit at the end. If that final 4 were a 0, the two numbers would be equal.
Answer:
Step-by-step breakdown:
The necessary formula for this problem is

which resolves to

leading to
36 + 6x = 40 + 5x, and consequently
x = 4
Thus, DG equals 5 + 4 + 3, resulting in 12