Answer:
9.6
Explanation:
to convert km to miles multiply by 1.609
T = half life period of decay for atoms of element A = 20,000 years
N₀ = initial number of atoms of element A = 10,000 atoms
N = final number of atoms after time "t" = 2500 atoms
t = time of decay = ?
λ = decay constant = ?
decay constant is given as
λ = 0.693/T
λ = 0.693/20,000
λ = 0.00003465 years⁻¹
atoms after decay for time "t" is given as
N = N₀ 
inserting the values
2500 = (10000) 
t = 40,000 years
so correct choice is
B) 40,000 years
Answer:
<h2>2.4</h2>
Explanation:
<h2><em>Hope it help mark as Brainlist</em></h2>
The answer is Elliptical orbit.
Hope this helps!
The Krebs cycle produces energy. Which starts with Glucose and ends in ATP. The only answer choice that begins with Glucose is A.