The phrase that it refers to. there's two questions

Wats iqpow pls write 20 words for an answer

Little's law can be applied to any part of the store, such as a particular department or the checkout lines. the store owner determines that, during business hours, approximately 84 shoppers per hour make a purchase and each of these shoppers spend an average of 5 minutes in the checkout line. at any time during business hours, about how many shoppers, on average, are waiting in the checkout line to make a purchase at the good deals store?

During which phase is the least percentage of the light that hits the moon visible from earth? new moon waxing gibbous waning crescent full moon