Let the width be 2w. Then the lenght is 5w. So:
(2w)(5w)=490
10w²=490
w²=49
w=±7
So, 2w=width=14 in; and 5w=length=35 in
☺☺☺☺
        
             
        
        
        
Answer: 
A
Explanation: horizontal line is 180 degrees, and the square means 90 degrees. So adding up the angles z + 90 + z =180
        
             
        
        
        
Answer:
Step-by-step explanation:
If you graph there would be two different regions. The first one would be 

And the second one would be 
 .
. 
If you rotate the first region around the "y" axis you get that 

And if you rotate the second region around the "y" axis you get that 

And the sum would be  2.51+4.188 = 6.698 
If you revolve just the outer curve you get 
If you rotate the first  region around the x axis you get that 

And if you rotate the second region around the x axis you get that 

And the sum would be 1.5708+1.0472 = 2.618
 
        
             
        
        
        
To find the area of a circle, you do π × diameter (in this case 10). They have told you to use 3.142 as π, so you do 3.142 × 10 = 31.42. Because it's a semi-circle, you need to halve 31.42 to get 16.21, which is the answer
        
                    
             
        
        
        
The answer is x-1 hope that helps not sure if it does