8.2 For the past year I have spent about $4 a day for lunch, give or take a quarter or so. a) Draw a rough sketch of this distribution of daily expenditures.
b) If, without looking at the bill, I paid for my lunch with a $5 bill and received $.75 in
change, should I worry that I was overcharged?
c) Explain the logic involved in your answer to (b).

Snakes, dogs, and humans have a vertebral column. snakes and dogs have tails, and humans have vestigial tailbones. dogs and humans have limbs, but snakes do not. most reptiles lay eggs, but a few give birth to live young. what do these structures suggest about the evolutionary pattern between the three organisms? 1. snakes and dogs are more closely related than snakes and humans. 2. snakes and humans are more closely related than humans and dogs. 3. dogs and humans are more closely related than snakes and humans. 4. dogs, snakes, and humans share a common ancestor. 5. the early ancestor of snakes and dogs is the same, and the early ancestor of humans is different.