Translate that to english please?
        
             
        
        
        
Answer:
The mass of the radioactive sample after 40 minutes is 12.8 g.
Step-by-step explanation:
The mass of the sample can be found by using the exponential decay equation:

Where:
N(t): is the amount of the sample at time t =?
N₀: is the initial quantity of the sample = 120 g
t = 40 min
λ: is the decay constant =  0.056 min⁻¹
Hence, the mass of the sample after 40 min is:

      
Therefore, the mass of the radioactive sample after 40 minutes is 12.8 g.
I hope it helps you!
 
        
             
        
        
        
Answer:
Given :A star in the sky appears to move by 12 arc seconds over the course of 6 months. 
To Find :Convert this number into first arc minutes then degrees. 
Solution:
60 arc seconds = 1 arc minute
1 arc seconds =  arc minute
 arc minute
12 arc seconds =  arc minute
 arc minute
12 arc seconds =  arc minute
 arc minute
So, 12 arc seconds =  arc minute
 arc minute
Now convert it into degrees
60 arc minute = 1 degree
1 arc minute =  degree
 degree
 arc minute =
 arc minute =  degree
 degree
 arc minute =
 arc minute =  degrees
 degrees
 12 arc seconds =  degrees
 degrees
 
        
             
        
        
        
Answer:
The next number selected should be between 2 and 3 .
Step-by-step explanation:
x. x    f(x)             g(x) 
0        10               17 
1           11              19 
2          14              21 
3          19              23 
4         26             25 
3.5      22.25        24 
<u>2.5      16.25         22</u>
1.5       12.25        20
0.5       10.25       18
We see the pattern that it is increasing with only a unit. The last given data is mid of the last two values that is 3 and 4.
So the next value would be the mid of the next last two values that is 2 and 3 and will be 2.5
Now it is moving in the reverse direction in the same pattern  with a difference of a unit. 
 
        
             
        
        
        
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