Answer 
Find the volume of the coin is cubic millimeters.
To prove
Formula

Where r is the radius and h is the height .
As given
The $1 coin depicts Sacagawea and her infant son.
 The diameter of the coin is 26.5 mm, and the thickness is 2.00 mm. 


Radius = 13.25 mm

Put in the formula
Volume  of  coin  = 3.14 × 13.25 × 13.25 × 2.00
                              = 1102.53 mm³ (approx)
Therefore the volume of the coin is 1102.53 mm³ .
 
        
             
        
        
        
Answer:
question 7 is A
Step-by-step explanation:
 
        
             
        
        
        
The 7 is in the Ones place
 
        
                    
             
        
        
        
Answer:
a= 180-60-55=65 
we know that the angle of a flat(?) ground would be 180, so we can take away the 60 and 55 to find a. 
b=180-90-65=25
the sum of interior angle of a triangle would be 180, now we know what a is, also the right angle is 90, now we can take away the 90 and 65 to find b.  
c=25 
c is 25, because two angles on both sides of a X is the same