Answer:
Step-by-step explanation:
13. -2(4)= -8     14. 6(-5)= -30       15. 3(-5)(2)= -30
16. -12(4)= -48     17. -4(2)^2= -64      18. (-5)^2= -25 
19. -5(-3)(4)= =60   20. 13(-5)(2)= -130.  21. 3(-3)= -9
Hope this helps!
 
        
             
        
        
        
What we know:
shape is circular
Area=64π yr²
Area=πr²
circumference=2πr
In order to find circumference we need r=radius. We can use the area to find r by solving for r using substitution of the information we know above.
Area=πr²
64π=πr²                         substitution
64π/π=π/πr²                  multiplicative inverse
64=r²
√64=√r²                          properties of radicals
8=r                     We would get two solutions, a positive and negative one                          but we will only use the positive solution since radius is positive
Circumference=2πr
C=2π(8)=16π yards
        
                    
             
        
        
        
Answer:
LOL i belive its 200 because i did this exact same thing yesterday for homework and got it right, if its not then i dont know what to say.
Step-by-step explanation:
 
        
             
        
        
        
1:equilateral
2:isosceles
3:scalene
4:right
5:acute
6:obtuse