Answer: B:17,190 years
Explanation: After 5730 years ( first half life) 70 /2 = 35 mg decays and 35 g remains left. After another 5730 years ( two half lives or 11460 years) 35 /2 = 17.5mg decays and 17.5 g remains left . After another 5730 years ( three half lives or 17190 years) 17.5 /2 = 8.75mg decays and 8.75g remains left.
i know this is off topic but, can you go to my quetions, to see if you can answer any?(or if you know anyone who can answer them)
Answer:
b.burning of fossil fuels
Explanation:
Burning fossil fuels has been considered controversial since it produces tons and tons of CO2 and CO2 is considered a green house gas which is contributing to climate change.
Photosynthesis and planting trees actually sucks Carbon dioxide out of environment. Perspiration doesn't produce CO2.
Fitness =being healthy adaptations=being able to adapt to your surrondings
So we can easily classify animals and distinguish their relationships
Jellyfish are like corals, gorgonians and anemones they belong
in the group called cnidarians also jellyfish is a kind of invertebrates. This
animal group has stinging cells which they use both to capture their prey and
also as a form of defense.the type of movement that the jellyfish has is called passive locomotion another example aside from jellyfish which is sailing are <span>kiting (spiders) and rolling (some beetles and spiders).</span>