Amedical scientist has a 15-gram sample of i-13, and would like to know it's half-life in days. he also knows that k=0.0856

find the half-life, in days, of i-131 using the information at the left. round to the nearest tenth

The number of days is approximately 8.                    

Step-by-step explanation:

Given : A medical scientist has a 15-gram sample of I-13, And would like to know it's half-life in days. he also knows that k=0.0856.

To find : The half-life, in days, of I-131 using the information at the left?

Solution :

The decay model is given by  

We have given that,  

The substance's half-life is the time it takes for the substance to decay to half its original amount.

i.e.

The value of k is k=0.0856.

Substitute the values in the formula,

Taking natural log both side,

Therefore, The number of days is approximately 8.

0.6

39mph

step-by-step explanation:

47 - 90 = 43

43 - 180 = x

x = 137