The formula for circumference of a circle 
=
2
π
r
The radius 
=
3
c
m
(assuming units to be in cm)
2
π
r
=
2
×
22
7
×
3
=
132
7
=
18.86
c
m
        
                    
             
        
        
        
Answer:
∠ ABC ≈ 137.9°
Step-by-step explanation:
Using the Cosine rule in Δ ABC
cos B = 
with a = 89, b = 144, c = 65
cos B =  =
 =  =
 =  , thus
 , thus
B =  ( -
 ( -  ) ≈ 137.9° ( to the nearest tenth )
 ) ≈ 137.9° ( to the nearest tenth )
 
        
             
        
        
        
So,
9*27 + 2*31 - 28 = n
We use PEMDAS.
Multiply from left to right.
243 + 2*31 - 28 = n
243 + 62 - 28 = n
Add or subtract from left to right.
305 - 28 = n
277 = n
        
             
        
        
        
Answer: total number of teaspoons of spices in the dish =3.25 teaspoons
Step-by-step explanation:
 Step 1
 Listing the spices and their quantities , we have
 Salt = 1/2 teaspoon
Orégano =1 1/4 teaspoon =5/4 teaspoons
 Basil = 3/4 teaspoon
 Pepper= in half as much pepper as salt -- This means that the quantity of pepper should be  50% more in quantity  than salt 
 Therefore quantity of pepper = 50% x 1/2 = 0.5 x 0.5= 0.25
0.25 +  1/2 = 0.25 + 0.5 = 0.75 = 3/4 teaspoon of pepper.
 
Step 2 
 Adding the amount of spices we have 
1/2 + 5/4+ 3/4+ 3/4 = 2+ 5+3+ 3/4 = 13/4 = 3 1/4 teaspoons of spices  = 3.25 teaspoons of spices .