Answer:
b is correct
Step-by-step explanation:
hope this helps
 
        
             
        
        
        
i think the answer is c :)
 
        
                    
             
        
        
        
The solution depends on the value of 

. To make things simple, assume 

. The homogeneous part of the equation is

and has characteristic equation

which admits the characteristic solution 

.
For the solution to the nonhomogeneous equation, a reasonable guess for the particular solution might be 

. Then

So you have


This means


and so the general solution would be
 
 
        
        
        
Answer:
The bird has to fly 7.5 m 
Step-by-step explanation:
Please see diagram in attached image.
Notice that there is a right angle triangle that defines the situation, and you know two elements of such triangle; 
1) one acute angle ( ), and
), and
2) the side opposite to that angle.
What you need to find is the side adjacent to the angle, which is what the bird needs to fly horizontally to be above the fish. We named that "x".
The trig function that relates such triangle elements is the tangent:

which rounded to the nearest tenth is: 7.5 m
 
        
             
        
        
        
Answer:
The surface area of the gift box is = 
Step-by-step explanation:
The surface area of the cylinder can be calculated using this formula:

in this case, r is not a number, but rather an expression, which is r =  .
.
The height of the gift box is twice the radius, which is h = 
To get our curved surface area, we carefully put the expressions for h and r into the equation.




The surface area of the gift box is = 