First draw a right triangle using the lighthouse as reference. Draw a dot (lighthouse) draw a line downward (south) with 2.2 km measurement. Next, draw a line to the right of the lighthouse (16.8 km)
The two legs are 2.2 km and 16.8 km. To complete the statement, we need to solve for the hypotenuse of the right triangle. 
Using the Pythagorean Theorem:
Assign a = 2.2 km
            b = 16.8 km
so,
c^2 = a^2 + b^2
2.2^2 + 16.8^2 = c^2
Therefore, the value of c is 16.94 km. 
        
             
        
        
        
Answer:
C. exactly one
Step-by-step explanation:
Hope this is helpful! Happy Halloween!
 
        
             
        
        
        
Answer:
Try to download the Gauth math app and snap ur equation problem and u can answer the equation problem
 
        
             
        
        
        
When something bisects an angle, it cuts that angle in half. This means that ray BD cuts angle ABC in half. Therefore, angle ABD, which is formed by cutting the angle in half, is equal to angle CBD, which is also formed by cutting the angle in half. Because of this, you have to set the equation equal to each other.
9x-18=5x+2
Combine like terms. Add 18 to both sides.
9x=5x+20
Combine like terms. Subtract 5x from both sides.
4x=20
Divide 4 on both sides.
x=5 degrees