We already know that the distance of all the planets are generally calculated by keeping the Sun as the main location point.
Explanation:
The distances of all the planets from the Sun in scientific notation and exponential form-
Mercury- 
57
 million kilometers. 
Scientific notation- 
5.7
⋅
10
7
km
Venus- 
108
 million kilometers.
Scientific notation- 
1.08
⋅
10
8
km
Earth- 
150
 million kilometers
Scientific notation- 
1.5
⋅
10
8
km
Mars- 
228
 million kilometers
Scientific notation- 
2.28
⋅
10
8
km
Jupiter- 
779
 million kilometers
Scientific notation- 
7.79
⋅
10
8
km
Saturn- 
1.43
 billion kilometers
Scientific notation- 
1.43
⋅
10
9
km
Uranus- 
2.88
 billion kilometers
Scientific notation- 
2.388
⋅
10
9
km
Neptune- 
4.5
 billion kilometers
Scientific notation- 
4.5
⋅
10
9
km
        
             
        
        
        
Subtract 15 from the depth:
200-15 = 185
Subtract 20 from the width ( 10 from both sides)
250-20 = 230
Area to build on: 185 x 230 = 42,550 square feet.
 
        
             
        
        
        
Answer: 40.5 square feet 
Step-by-step explanation:
Given : Zhi needs new flooring for her two laundry rooms.each room is 4.5 feet long and 4.5 feet wide .
We assume that the room is rectangular in shape .
Area of rectangle = Length x width
Then area of one laundry room = 4.5  feet x 4.5 feet = 20.25 square feet
Area of two laundry room = 2 x 20.25 = 40.5 square feet.
Hence, The flooring need to cover a total of <u>40.5 square feet</u> of area.