There are 12! ways to line 12 people up.  That is 12 factorial (the name for the exclamation point
12! means 12 x 11 x 10 x 9 x 8 x 7 x 6 x 5 x 4 x 3 x 2 x 1
Using a scientific calculator to compute 12!, we get 479,001,600 ways to line up 12 people.  I know it sounds amazing but here is a chart.
People            Ways
3                       6
4                      24  (Notice that if you multiply 6 x 4 you get 24)
5                     120  (Notice that if you muliply 24 x 5 you get 120  etc.)
6                     720
7                     5040
8                    40,320
9                    362,880
10                 3,628,880
11               39,916,800
12               479,001,600
        
             
        
        
        
Answer:
262.12mph and 419kph
Step-by-step explanation:
Given: It takes 4 hours and 15 minutes to fly from Orlando, Florida, to Boston, Massachusetts. The distance between the two cities is 1114 miles
To Find: the average speend of the plane in miles per hour, If every mile is approximately 1.6 kilometers, the speed of the airplane in kilometers per hour
Solution: 
Distance between Orlando,Florida and Boston, Massachusetts 
 
Time taken to cover the distance  and
 and 
We know that,

                                           
                                           
                                            
 
It is given that,

therefore,

Speed Of plane in Kilometers per hours 
                                                                    
Speed of in miles per hour  is  
  and Speed in kilometer per hour
 and Speed in kilometer per hour  
 
        
             
        
        
        
Answer:
187
General Formulas and Concepts:
<u>Pre-Algebra</u>
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
Step-by-step explanation:
<u>Step 1: Define</u>
(3 + 2)² × 7 - 13 + 5²
<u>Step 2: Evaluate</u>
- (Parenthesis) Add:                     5² × 7 - 13 + 5²
- Exponents:                                 25 × 7 - 13 + 25
- Multiply:                                      175 - 13 + 25
- Subtract:                                     162 + 25
- Add:                                            187
 
        
             
        
        
        
The width of a room can be from around 15 cm to about 40 cm.
meaning 1 m
and about  less than 1/6 of a km
Hope it helped!