Answer:
option A
Step-by-step explanation:
given,
sample of tritium, ³H
contents present of ³H = 5.25 mol
content of ³He = 6.35 mol
reaction
A₀ is the initial concentration
At is the concentration after time t
A₀ = 5.25 + 6.35 = 11.6 mol
At = 5.25
now,
k = 0.0563 /year
t = 14.1 yr
hence, the correct answer is option A
D is the answer...........
X + y = 4
x - y = -6
--------------add
2x = -2
x = -2/2
x = -1
x + y = 4
-1 + y = 4
y = 4 + 1
y = 5
solution is : (-1,5)
Answer:
Take a sleep like 25 minutes and then you will be able to answer it for yourself
Answer: Margin of error would be 1.47 for 95% confidence.
Step-by-step explanation:
Since we have given that
Mean = 26.8
Standard deviation = 7.5
n = 100
We need to find the margin of error for 95% confidence.
So, z = 1.96
So, the margin of error would be
Hence, margin of error would be 1.47 for 95% confidence.