3 is 95 and 4 is 85. I believe
        
             
        
        
        
So, first, what are the two sides? 
let's call then x and y
we know that 2(x+y)=12.5 (that's the distance around)
so that means that x+y=6.25 (I just divided both by 2)
now, x=4y (from "4 times as long as it is wide")
so we can substitute: 
x+4x=6.25
5x=6.25
x=1.25
so one side, is 1.25 and the other will be 1.25*4=5
and for the area we multiply the two: 
1.25*5=6.25 square kilometers, and this is the answer!
        
                    
             
        
        
        
7.. 
49 can be equally divided by seven, which means there would be 9 red roses in each center piece. And 63 can be equally divided by 7 which means there would by 7 white roses in each center piece. 
hope this helps
        
             
        
        
        
Answer:
a
Step-by-step explanation:
9(5x)=45x
9(2)=18
4(8)=32
4(-x)=-4x
45x-4x=41x
32+18=50
41x+50 
 
        
             
        
        
        
6 to the third power would be 6x6x6 which equals 216. All you do to find the power is multiply the number by its self the amount of times it asks like 4 to the second power would be 16 and 8 to the 4 power would be 4096