the weight of the substance after 28 years is 8 grams.
<h3>How to determine the amount</h3>
We have that the half life of a substance is defined as the time required for the substance to decrease by half
The formula for calculating the half - life of a material is given as;
Where
- N(t) is final amount
- No is the initial amount = 128 grams
- t1/2 is the half life = 7 years
- t is the time elapsed = 28 years
Substitute into the formula
N(t) = 128 × (0. 5) ^28/ 7
N (t) = 128 × ( 0. 5) ^ 4
N(t) = 128 × 0. 0625
N(t) = 8 grams
Thus, the weight of the substance after 28 years is 8 grams.
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I think answer should be 10 Please give me brainlest I hope this helps let me know if it’s correct thanks
I dont know. So i am sorry ask someone alse. Thanks
Answer:
3/4
Step-by-step explanation:
→ 33/44
→ (33 ÷ 11)/(44 ÷ 11)
→ 3/4
So, the simplest term is 3/4.