The half a particular radioactive substance is 1 year. If you started with 50 grams of this substance, how much of it would remain after 3 years?

answer: i think it's a

step-by-step explanation:

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r3t40

the highest percentage for deaths in construction from highest to lowest is as follows: falls, struck by objects, electrocution, and caught-in/between. these four are collectively known as fatal four.

in the case of falls, the type that is responsible for the overall highest death in the category is falls from roofs.