Answer:
-2+4i
Step-by-step explanation:
Simplify by combining the real and imaginary parts of each expression.
 
        
                    
             
        
        
        
Answer:
The last option:  27 times the original volume.
Step-by-step explanation:
The dimensions are tripled so and  we are talking volumes so:
The factor of enlargement is 3^3 = 27.
 
        
                    
             
        
        
        
 70.1 ft² of fabric is needed by Lacy to make the sail boat.
<h3>
Trigonometric ratio</h3>
Trigonometric ratio is used to show the relationship between the sides and angles of a right angled triangle.
Let b represent the base of the triangle and h the height, hence:
sin(60) = h / 18
h = 15.6 feet
sin(30) = b / 18
b = 9 feet
The area of triangle = (1/2) * b * h = 0.5 * 9 * 15.6 = 70.1 ft²
 70.1 ft² of fabric is needed by Lacy to make the sail boat.
Find out more on Trigonometric ratio at: brainly.com/question/6459892
 
        
             
        
        
        
Answer: 8
Step-by-step explanation: