What percent of potassium-40 remains undecayed in a rock that is 3.9 billion years old? The 3.9 billion year old rock has undergone three half-lives (3.9 divided by 1.3 = 3). After 3 half-lives, 12.5% of the potassium-40 remains undecayed.
Excess carbohydrates and fats are stored; excess proteins are not
Jack. A signpost is a non-living thing and non living things do not grow. Sam is an adult and he has stopped growing already. Jack is a child and will continue growing the next few years.
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Hello!
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❖ The correct answer is B. Chemoautotrophs.
~ ʜᴏᴘᴇ ᴛʜɪꜱ ʜᴇʟᴘꜱ! :) ♡
~ ᴄʟᴏᴜᴛᴀɴꜱᴡᴇʀꜱ
There are several sources in which one may turn to in order to establish a well-founded idea, information, and knowledge towards a given topic. From this item, books were collectively identified as the first source for Jamal's science essay.
The second one could be the information found in the internet. These information have lately became very accessible considering that one could directly upload/download information. The tricky part here is to identify which sources in the internet are reliable and which are not.
