Different between Daisy-wheel printer and Dot-matrix printer​

Which demographic challenge is europe currently experiencing? a. an aging and decreasing population b. a baby boomc. an unequal distribution between males and females d. a large group of teenagers moving through the school system(i chose a but i'm unsure)

Whats three fourths of 15(this is supposed to be in math but i clicked too fast)

Hazel has just finished adding pictures to her holiday newsletter. she decides to crop an image. what is cropping an image?