Answer:
31.5
Step-by-step explanation:
divide 42 by 4 you would get 10.5, then multiple 10.5 by 3 and you would get 31.5 thats the answer
Sorry I need a picture to answer sorry :c
Answer:
See Explanation
Step-by-step explanation:
<em>The options are not given; however, you can take a clue from my explanation to answer your question</em>
Let x be a real number;
Additive identity property implies that; adding x to 0 or 0 to x gives x;
In other words;
![x + 0 = x](https://tex.z-dn.net/?f=x%20%2B%200%20%3D%20x)
![0 + x = x](https://tex.z-dn.net/?f=0%20%2B%20x%20%3D%20x)
Note that x can be replaced with any real number; Take for instance
![1 + 0 = 1](https://tex.z-dn.net/?f=1%20%2B%200%20%3D%201)
![0 + 2.5 = 2.5](https://tex.z-dn.net/?f=0%20%2B%202.5%20%3D%202.5)
![3 + 0 = 3](https://tex.z-dn.net/?f=3%20%2B%200%20%3D%203)
There are uncountable number of examples;
<em>However, take note that adding 0 to a given digit results in the exact digit and that's the implication of addition identity property</em>
The applicable decay formula is:N = No*e^(-kt)WhereN = Mass left after time tNo = Original massk = constantt = half lifeUsing the values given,N/No = e^(-0.1446t) = 1/2ln (1/2) = -0.1446 t *ln e^1-0.6931 = -0.1446 tt = 0.6331/0.1446 = 4.79 daysTherefore, half-life is 4.8 days.
Answer:
The answer is 12.8.
Step-by-step explanation:
0.16 times 80 = 12.8