16 because the legth of TQ is the same as SR I hope thats right i checked with a ruler. :)
 
        
             
        
        
        
Answer:
W = 90 ft
Step-by-step explanation:
1 acre = 43,560 ft^2
A (area) = L (length) x W (width),
L = 484
A = 43560
W = A/L
= 43560/484
= 90 ft 
 
        
             
        
        
        
Answer:
 3 strain would still alive after 48 hours
Step-by-step explanation:
Initial population of virus = 40000 grams 
A certain virus is dying off at a rate of 18% per hour. 
We are supposed to find  how much of the  strain would still be alive after 48 hours
Formula : 
 =Initial population
=Initial population
N(t)= Population after t hours 
r = rate of decrease = 18% = 0.18
t = time = 48 hours 
So,the  strain would still be alive after 48 hours=
Hence 3 strain would still alive after 48 hours
 
        
             
        
        
        
Hello :
x²+8x-3=0
(x² +2(4)x +4²) -4² -3 = 0
(x+4)²-19 = 0
(x+4)² = 19
x+4 = √19    or x+4 = - √19
 x = √19 - 4  or  x = -√19 - 4