Answer:
Heyo. The answer is 60.48
Step-by-step explanation:
This is pretty easy, all you have to do is multiply the length, height, and width. Remember this. LxHxW. Thats is the formula. You do 4.2 cm, multiplied by 3.2 cm, then multiply that by 4.5 cm. Hope this helps! :)
 
        
             
        
        
        
Hey there! 

Formula for the area of a triangle is (1/2)bh. 
Base of this triangle is 5, height is 4. 
Image attached. 
Plug values into the formula: 
A = (1/2)(5)(4) 
Simplify. 
A = (1/2)(20) 
A = 10 
Area of the triangle is 10 units². 
Hope this helps! 
 
        
                    
             
        
        
        
8•13=104
7•13=91
6•13=78
104+91+78=273
        
                    
             
        
        
        
79 ft/s = 0.0240792 km/s
0.0240792 x 60 = 1.444752 km/minute
<span>1.444752 x 60 = </span><span>86.68512 km/hour
</span>
Ans: 86.69 km/h