Angle = 68⁰ is an inscribed angles, this angle equal 68⁰, 
so it intersect arc = 2*68⁰= 136⁰.
Arc of the whole circle (circumference) =360⁰,and it also =b+104+136.
b+104+136 =360
b=360-(104+136) = 120⁰
Answer A. b=120⁰.
 
        
             
        
        
        
Answer:
Question 2
Step-by-step explanation:
2) The time when she woke up was -  3° C
During nature walk, temperature got 3° C warmer than when she woke up.
So, temperature during nature walk = - 3 + 3 = 0° C
 
        
             
        
        
        
Answer:
2
Step-by-step explanation:
 
        
             
        
        
        
Answer:
24 hours 
Step-by-step explanation:
hoped this helped
 
        
             
        
        
        
Answer:
5 and 25
Step-by-step explanation:
let the son's age be x then the father's age is x + 20
In 5 years
son = x + 5 and father = x + 20 + 5 = x + 25
Then
x + 25 = 3(x + 5) ← father is three times as old as son
x + 25 = 3x + 15 ( subtract x from both sides )
25 = 2x + 15 ( subtract 15 from both sides )
10 = 2x ( divide both sides by 2 )
5 = x and x + 20 = 5 + 20 = 25
si=on is 5 and father is 25