It would be 10 hours. 25 times 2 is equal to 50 and so you would times 5 by 2 and get 10 hours
        
             
        
        
        
Answer:
b
Step-by-step explanation:
 
        
             
        
        
        
9514 1404 393
Answer:
   1)  f⁻¹(x) = 6 ± 2√(x -1)
   3)  y = (x +4)² -2
   5)  y = (x -4)³ -4
Step-by-step explanation:
In general, swap x and y, then solve for y. Quadratics, as in the first problem, do not have an inverse function: the inverse relation is double-valued, unless the domain is restricted. Here, we're just going to consider these to be "solve for ..." problems, without too much concern for domain or range.
__
1) x = f(y)
   x = (1/4)(y -6)² +1
   4(x -1) = (y-6)² . . . . . . subtract 1, multiply by 4
   ±2√(x -1) = y -6 . . . . square root
   y = 6 ± 2√(x -1) . . . . inverse relation
   f⁻¹(x) = 6 ± 2√(x -1) . . . . in functional form
__
3) x = √(y +2) -4
   x +4 = √(y +2) . . . . add 4
   (x +4)² = y +2 . . . . square both sides
   y = (x +4)² -2 . . . . . subtract 2
__
5) x = ∛(y +4) +4
   x -4 = ∛(y +4) . . . . . subtract 4
   (x -4)³ = y +4 . . . . . cube both sides
   y = (x -4)³ -4 . . . . . . subtract 4
 
        
             
        
        
        
Answer:
M=47.99988
Step-by-step explanation:
M=1.33333(16+20)
=1.33333(36)
=47.99988