The following figures are similar. They are both the same shape, One is just bigger. 
        
             
        
        
        
Answer:
12. 524 in³ (3 sig. fig.)   13. 2000 cm³ (3 sig. fig.)
Step-by-step explanation:
12. Volume of sphere = (4/3)πr³ 
= 500/3π
= 524 in³ (3 sig. fig.)
13. Volume of cylinder = πr²h
= 7²π(13)
= 637π
= 2000 cm³ (3 sig. fig.)
 
        
             
        
        
        
Answer:
-7k+21
Step-by-step explanation:
 
        
                    
             
        
        
        
Correct answer is B (2,2)
        
                    
             
        
        
        
Answer:
x + 5 * 4
In this problem we have to transfer the expression from verbal to mathematical language. Which would be:
x + 5 * 4
"x" represents "a number"
"5 more than a number" is represented by "x + 5"
"the product of" is indicating a multiplication, which is represented by "*"
Hope it helped,
BioTeacher101