U can change it by using the rule of logarithm.
log (10/y)= log10 - log y
<h2>
Explanation:</h2>
Here we know that at 3:17 pm you started to bake the cake. The total revolution the minute hand on the clock makes is:

We know that:

Solving for x:

So it takes 70 minutes after you put the cake in the oven. But:

Adding this to the initial time:

Finally, the cake is done at 4:27 pm, option C.