<span>A=<span><span>3<span>(5+7)</span></span>2</span>=<span><span>3<span>(12)</span></span>2</span>=<span>362</span>=18<span> km^2</span></span>
 
        
             
        
        
        
Answer:
The area of rectangle is 12cm² and the perimeter is 14cm.
Step-by-step explanation:
First, you have to find the length of the rectangle using Pythagoras Theorem :
a² + b² = c²
a² + 3² = 5²
a² = 5² - 3²
a² = 16
a = √16
a = 4 cm
Next, you have to find the perimeter and area of rectangle :
Perimeter = 2(length + breadth)
P = 2(4 + 3)
P = 2(7)
P = 14 cm
Area = length×breadth
A = 4×3
A = 12 cm²
 
        
             
        
        
        
False
Exponents should not be simplified.
        
             
        
        
        
Answer:
3,080 in³
Step-by-step explanation:
To find the volume you use the formula
Length*Width*Height= Volume
So,
14*11*20 = 3080
and you unit will be cubed because volume is cubed!
 
        
             
        
        
        
-5 ÷w=?
Answer the rest on your own but I just set it up for you.