The complete queston is The amount of a radioactive element A at time t is given by the formula
A(t) = A₀e^kt
Answer: A(t) =N e^( -1.2 X 10^-4t)
Explanation:
Given
Half life = 5730 years.
A(t) =A₀e ^kt
such that
A₀/ 2 =A₀e ^kt
Dividing both sides by A₀
1/2 = e ^kt
1/2 = e ^k(5730)
1/2 = e^5730K
In 1/2 = 5730K
k = 1n1/2 / 5730
k = 1n0.5 / 5730
K= -0.00012 = 1.2 X 10^-4
So that expressing N in terms of t, we have
A(t) =A₀e ^kt
A₀ = N
A(t) =N e^ -1.2 X 10^-4t
The pressure of the air at the way its blowing
Answer:
The explorer should travel to reach base camp to 5.02 Km at 4.28° south of due west.
Explanation:
Using trigonometric function like Sen(Ф), Cos(Ф) and Tan(Ф) we can get distance and direction that the explorer should travel to reach base camp. When we discompound the vector 
y 
so that 
; 
to get how far we use Pythagorean theorem so 
so that 
Partial eclipse, Annular eclipse,
Total Eclipse and Hybrid Eclipse are the four different
types of the eclipses. When the Sun and Moon are exactly in line with the Earth, the annular eclipse occurs.
The new moon is invisible from the earth and it is silhouetted against the sun,
this can only be seen in annular eclipse. Annular word means ring shaped, we
can see a dark ring of fire in annular eclipse. It has five different stages
that are first contact, second contact, maximum eclipse, third contact and 4th
contact.
