Answer:
4
Step-by-step explanation:
The question is not clear. You have indicated the original function as 12sin(0) - 9sin²(0)
If so, the solution is trivial. At 0, sin(0) is 0 so the solution is 0
However, I will assume you meant the angle to be  rather than 0 which makes sense and proceed accordingly
 rather than 0 which makes sense and proceed accordingly 
We can find the maximum or minimum of any function by finding the first derivate and setting it equal to 0
The original function is 

Taking the first derivative of this with respect to  and setting it equal to 0 lets us solve for the maximum (or minimum) value
 and setting it equal to 0 lets us solve for the maximum (or minimum) value
The first derivative of  w.r.t
 w.r.t  is
 is
                         
And setting this = 0 gives

Eliminating  on both sides and solving for
 on both sides and solving for  gives us
 gives us 
 
 
Plugging this value of  into the original equation gives us
 into the original equation gives us 

This is the maximum value that the function can acquire. The attached graph shows this as correct
 
        
             
        
        
        
Answer: 42.6% or you can round it to 43%
Step-by-step explanation:
 
        
             
        
        
        
I’m pretty sure the answer would be A,because if her bill is $97 and it’s $0.10 every txt she sends then and she wants to spend less then $113 then if you take $113 and subtract it by 97 it gives you 16 then if you divided 16/ 0.10 then it gives you 160 so she is sending atleast 160 txt.
        
             
        
        
        
I got b I think that’s the answer