Answer:
Chris will take 0.75 seconds to return to his starting height of 10 feet.
Step-by-step explanation:
Let the height of Chris be represented by  , where
, where  is the height in feet and
 is the height in feet and  , the time in seconds. First, we equalize the formula to a height of 10 feet and simplify the resulting expression, that is:
, the time in seconds. First, we equalize the formula to a height of 10 feet and simplify the resulting expression, that is:


Then, we simplify the expression by algebraic means:

Roots of the polynomial are, respectively:

First root represents the initial height of Chris, whereas the second one represents the instant when Christ returns to the same height above the surface of the water. Hence, Chris will take 0.75 seconds to return to his starting height of 10 feet.
 
        
             
        
        
        
Answer:

Step-by-step explanation:
Length of rectangular garden (l) = 16 feet
Width of rectangular garden (w) = 4 feet


 
        
             
        
        
        
Answer: you will use the cosine rule
Step-by-step explanation:
x^2=11^2+8^2-2(11)(8)xcos(16)
x^2=185-169.18
x^2=15.8
Take square root 
x=3.96 or 4
 
        
                    
             
        
        
        
Depends on what it is, i'd personally love to at any point 
        
             
        
        
        
I believe the answer would be 1086.4
Please give a like if I’m right and tell me in the comments if I’m wrong.
Hope this helped :)