Answer:
   Earth
Step-by-step explanation:
You don't need scientific notation.
The areas of similar figures are proportional to the square of their linear scale factor. If Mars is 1/2 the diameter of Earth, its total surface area is (1/2)² = 1/4 that of Earth.
That is, the land area of Mars is 25% of the total area of Earth.
The land area of Earth is 1-70% = 30% of the total area of Earth. 30% is more than 25%.
Earth has more land area than Mars.
 
        
             
        
        
        
Answer:
x*15% (x times fifteen percent)
Step-by-step explanation:
Say x is 20, you multiply 20 times 15% and that will be your answer
 
        
                    
             
        
        
        
Answer:
Let C be the cost for the people staying
if n <= 2 ;  C = $125
If n >2 ;   C =  $125 + $25 * (n-2)
Step-by-step explanation:
If the number of people is more than two, we need to add $25 for each of them.
Since n will be the number of people staying, we need to make sure that we substract two from this term to avoid overcharging the guests when there is less than two people.
So 
(n-2) is the term that should be multiplied by a factor of 25.
 
        
             
        
        
        
Slope is 1/2. Give brainly or I wont answer another one of your questions