A radioactive material is an element that is highly unstable due to its high neutron-to-proton ratio. Because of this, they spontaneously undergo nuclear reaction under nuclear fission releasing subparticles. The time it took to consume half of the original amount of the radioactive material is called the half-life.
The equation is <span>a2=ae^(−9.753t), where a2 is the concentration after time t and a is the original concentration. The ratio of a2/a should be 0.5/1 or 1/2. Therefore,
a2/a = e^(-9.753t)
0.5 = e^(-9.753t)
ln(0.5) = lne^(-9.753t)
ln(0.5) = -9.753t
t = 0.071 days or 1.7 hours.
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Angle CAB is congruent to angle C'A'B'. This is given.
Angle CBA is 56 degrees. This is from the sum of interior angles of a triangle (180 - 41 - 83 = 56)
Angle CBA is congruent angle C'B'A'. Angle CBA is 56 degrees.
Triangle CAB is similar to triangle C'B'A. By the AAA similarity postulate.<span />
Answer:
8000
Step-by-step explanation:
top: 20 * 2 / 2 *40 = 800
bottom: 20 * 40 * 9 = 7200
add
I dont know all of them bur i think question 6 is choice C
