Answer:
To know the distance between the sun and the earth you need isolate d of the equation:

and the additional information needed is the velocity of light and the time elapsed to be in the earth
 
        
             
        
        
        
Answer:
Therefore the area of the screen cleared is 1414.28 cm².
Step-by-step explanation:
Given:
a windscreen wiper of a vehicle of length 30 cm 
Consider this length as Radius of Semicircle, r = 30 cm
clears out an angle of 180 degrees implies Semicircle Shape
pie=22/7 
To Find:
Area of the screen cleared 
= ?
Solution:
We have

Substituting r and pie we get

Therefore the area of the screen cleared is 1414.28 cm².
 
        
             
        
        
        
Answer:
Heating and cooling costs might vary considerably.