To arrange the integers in descending order, we need to sort them from the largest to the smallest values. Let's look at the integers given:
+91, -9, -2, +11, 0, -3
First, we can separate the positive integers from the negative ones:
Positive integers: +91, +11
Negative integers: -9, -2, -3
Now, let's arrange them in descending order by looking at their magnitudes (ignoring the signs):
+91, +11, -9, -3, -2
Finally, considering the signs, we get the integers in descending order:
+91, +11, -2, -3, -9
Therefore, the integers in descending order are: +91, +11, -2, -3, -9.