Radiologically, half lives describe the amount of time it takes for half the amount of the radioactive substance to decay. If you had 100g of a radioactive substance with a half life of one week, in seven days, only 50g would remain, and after another week, only 25g.
Fifteen days contains three half lives since the half life is 5 days long. Divide the starting amount by 2 for each half life that passes.
600g - 300g (1 HL) - 150g (2 HL) - 75g (3 HL)
So, only 75g of Bismuth-210 would remain after 15 days.
Answer:
L=7.295
Step-by-step explanation:
I can't type in a square root symbol so here's the sequence:
divide both sides by 2 Pi
square both sides
now you have:
.227973=L/32
multiply both sides by 32
L=7.295
Answer: BRAINLIEST?
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Step-by-step explanation:
Polygon is a part rectangle:
base= 14 ft
left side = 9 ft
right side = 4 ft
adjacent side to it on the right = 3ft
Area = 2 b h + lw+lw = 25 *2+40+36 = 126 ft²