Answer: 
Step-by-step explanation:
Here the total numbers are 1, 4, 3, 7, 6
Since the total number of possible arrangement =
The total number of the odd numbers in the given numbers = 3
Thus the possible arrangement that the first three digits will be odd numbers = 
Thus, the probability that the first three digits of Irvings ID number will be odd numbers = the possible arrangement that the first three digits will be odd numbers / total possible arrangement =
= 
Answer:
24.9π
Step-by-step explanation:
Curcle Area=πR^2
A= πR^2 × 140°/360°
A= π×8^2 × 0.389 =~ 78.15
72.5+5.6= 78.1
78.1 degrees
By the chain rule,


We also have

,

, and

, so at this point we get