So 1st consider that it's a square! That's very important. So for a square, all 4 sides are equal.
And now considering that the given information is the diameter. So any angle made at the circle extended from the 2 points of diameter gives an angle of 90°
Now consider one triangle. So we already know that 2 sides of the triangle are equal (because they are 2 sides of a square) , has a side of 10 (diameter) and and angle of 90°. So remaining 2 angles are 45° 
Now solve it by applying 
 
 
        
        
        
Use the equation of motion under gravity:-
s =  16t^2    where s is the distance and t = time
2063 = 16t^2
t^2 = 2063 / 16 =  128.94 s
t = sqrt 128.94  =  11. 4 seconds to the nearest tenth of a second
        
             
        
        
        
Answer:500
Step-by-step explanation:26,000/52=500 i did<em> $26,000</em> divided by 52 because there are<em> </em><em>52 weeks in a year</em> and it gave me <em>500</em> so that is how i got the answer