All of the states of the USA are north of the equator.
So are all the states of Mexico.
More than 75 percent
Explanation:
Let us carefully analyze this problem:
The half life of the rubidium isotope = 50 billion years
The half-life of a radioactive isotope is the time it takes for it to decay to half of its original amount.
Every 50years, we know that a rubidium isotope would split into half.
Initially when the isotope was formed, we would only have the parent atoms there. There wont be any daughter;
ratio of parent to daughter = 100 : 0
When the isotope decays to half; we would have equal number of parent and daughter:
ratio of parent to daughter at half life = 50 : 50
The age of the earth is about 4.6billion years;
this is;
x 100 = 9.2% of the half-life of the rubidium isotope.
At this time, we should know that only 9.2 percent of the daughter would have been formed.
The remaining parent would be 100 - 9.2 = 90.8% would still be left undecayed.
The ratio of parent to daughter = 90.8 : 9.2
This is more than 75% of the parent
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Answer:
The answer is (A) ⇒ AB = 6
Step-by-step explanation:
∵ Answer (B) is the name of the segment
∵ In answer (C) A is a point can not = 6
∵ In answer (C) B is a point can not = 6
∴ The answer is (A)
When you write the length of any segment just writ the start point and end point of the segment
Answer:
A current in the southern hemisphere moving from west to east at approximately 40°-55°S, caused by prevailing western winds. It encircles the earth, crossing the Atlantic, Indian, and Pacific oceans; the cold Bengal, West Australian, and Peru currents branch off from it in the oceans.
I hope it's helpful!
Answer:
B
Explanation:
There are 7 billion people in the world and we approached that number in 2011.