It says that mean of six nos is 4.7
So, that means ( no pun intended), the average of six numbers give a value of 4.7
the same goes for the average of the other four numbers=6.5
If we're talking about the mean ( average) of all the ten numbers , we usually would need the ten numbers ( their values and their frequency) , but since its already given as mean itself , we could just add up the values.
4.7+6.5=11.2
1. Proportional
2. Not Proportional
3. Not Proportional
4. Proportional
5. Proportional
By applying the definition of logarithm, you have
So, if you consider the cubic root of both sides, you have
![x = \sqrt[3]{64} = 4](https://tex.z-dn.net/?f=%20x%20%3D%20%5Csqrt%5B3%5D%7B64%7D%20%3D%204%20)
He is incorrect because since 0.029 is in the thousandths place the fraction would be written as 29/1000
Answer:
It will take 15.029 years for element X to reach mass of 260 grams
Step-by-step explanation:
The half life period of radioactive element X is 26 years
The initial mass of radioactive element X is 260 grams
Elapsed time = half life * log (beginning amount /ending amount)/log 2
Substituting the given values, we get
Elapsed time = 26 * log (390/260)/log 2
= 15.209 years
