Answer:Mark Is 9 years old; Christine is 5 years old 
Step-by-step explanation:
 Present age 
 LET  mark age be x
 Christine be x-4 yrs
In 3 yrs Time 
Mark will be x+3 yrs old
Christine  will be  (x -4 +3) = x-1 years old 
Also, In 3 years time 
Christine  = 2/3 Mark
such that 
   x-1 = 2/3(x+3)
   x -1= 2x+6 / 3
     3x  -3= 2x+6
       3X--2X = 6+3
          =X=9
Mark Is 9 years old 
Christine is   x -4 = 9-4=5 years old 
 
        
             
        
        
        
Answer:
EF=3.6
Step-by-step explanation:
I'm going to use Pythagorean Theorem for side EF.
4.8^2+EF^2=6^2
23.04+EF^2=36
-23.04 -23.04
EF^2=12.96
sqrt sqrt
EF=3.6
 
        
             
        
        
        
Answer:
1526.8 ft ^3
Step-by-step explanation:
the volume of a cylinder formula is V=π x r^2 x h
= pi x 9^2 x 6
= pi x 81 x 6
=1526.8 ft ^3
 
        
                    
             
        
        
        
The two do not save money at the same rate, because if you make common denominators of 20, Anna saves 6 dollars for every 20, while Patrick only saves 5 dollars for every twenty earned. So, Anna ends up saving more than Patrick.