Pupils tend to become bigger (dilate) in low-light situations. This allows more light into the eyes, making it easier to see, I looked it up to make sure. Pupil is the right answer.
Any number divided by itself is 1. In the expression-1 times -10 over -1 times -60 ,the -1s in the numerator and the denominator cancel each other out to give the result , or 6.
