A substance known as aerogel has one of the lowest known densities of any solid. Around 2004, NASA used aerogel to obtain interstellar dust from the tail of a comet. How many pounds of aerogel are in a cubic foot? The density of aerogel is 3.0 mg/cm. Do not enter “pounds” as part of your answer.

(b) which contains higher levels of vitamin b, oranges or spinach?

explanation:

you can eliminate a, c, and d because they are questions based on opinions.

answerlinnaeus;

they all get energy from eating other animals, dead animals to be more precise.

hienas tends to steal pray from other animals. crows and vultures tend to eat dead animals and leftovers.

hope it ,

bioteacher101