The radioactive element carbon-14 has a half-life of 5750 years. A scientist determined that the bones from a mastodon had lost 56.8% of their carbon-14. How old were the bones at the time they were discovered?

Question 3 of 30 paul buys fruit to make smoothies. he buys 3.78 pounds of apples, 2.12 pounds of peaches, and 4.45 pounds of oranges. paul rounds each weight to the nearest tenth of a pound. about how many pounds of fruit did paul buy? (a) 10.5 pounds (b) 10.2 pounds (c) 10.4 pounds (d) 10.0 pounds 30 points

What is the remainder when 2872 is divided by 76? a) 51 b) 57 c) 60 d) 63

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?