Final answer:
Trinity would take approximately 3 hours and 50 minutes to shovel the driveway alone.
Step-by-step explanation:
To find how long it would take Trinity to shovel the driveway alone, we can set up a ratio based on the information given.
Let's assume Orlena's rate of shoveling is 'o' and Trinity's rate is 't'.
We can set up the equation as: 1/o + 1/t = 1/4 (since together they take 4 hours to shovel the driveway).
Simplifying the equation, we get: t + o = 4
Since we know Orlena's rate is 6, we can substitute it into the equation: t + 1/6 = 4
Subtracting 1/6 from both sides gives us: t = 4 - 1/6 = 23/6
Therefore, it would take Trinity 23/6 hours to shovel the driveway alone, which is approximately 3.83 hours or 3 hours and 50 minutes.