It is 4 longitude and elevation
The correct answer of the given statement above whether it is true or false would be TRUE. It is true that the Andean nation of Bolivia is poor<span>, but but</span><span> rich in natural attractions that fuel a growing ecotourism economy. </span><span>Bolivia is named for Simon Bolívar. He is the liberator of much of South America that is poor, mountainous, and landlocked. Hope this answer helps.</span>
Hurricane, volcano and earthquake are the natural disasters that all have the potential to wreck havoc and impact the human populations. So the correct option among all the options given in the question is option "d".
Widening rivers can be a very important cause that can increase the risk of flooding. The correct option among all the options given in the question is option "d". If the humans deliberately cut the banks and widens the river, then it can cause floods during the rainy season as the banks become weak to hold the force of water that comes in.
Answer:
Option C. 2 half lives.
Explanation:
The following data were obtained from the question:
Original amount (N₀) = 1000 atoms
Amount remaining (N) = 250 atoms
Number of half-lives (n) =?
Half-life is defined as the time taken for the substance to reduce to half its original side. Mathematically, it can be obtained as follow:
N = 1/2ⁿ × N₀
N is the amount remaining.
n is the number of half-lives.
N₀ is the original amount.
Using the above formula, we can obtain the number of half-lives as follow:
Original amount (N₀) = 1000 atoms
Amount remaining (N) = 250 atoms
Number of half-lives (n) =?
N = 1/2ⁿ × N₀
250 = 1/2ⁿ × 1000
Cross multiply
250 × 2ⁿ = 1000
Divide both side by 250
2ⁿ = 1000/250
2ⁿ = 4
Express 4 in index form
2ⁿ = 2²
n = 2
Therefore, it will take two (2) half lives for the amount to get to 250 atoms.
