Answer:
52.85
Step-by-step explanation:
perimeter of the rectangle is 40
perimeter of the half circle is 12.85
add those two together and get 52.85
MARK ME BRAINLIEST PLEASE
 
        
             
        
        
        
Answer:
should be 0.28125
Step-by-step explanation:
 
        
             
        
        
        
If you have for example 
19.90$ you round it as 20 
if u have 19.05 you have it as 19 only because its not near to the next number to it
        
             
        
        
        
Answer:  About 191 students scored between a 60 and an 80.
Step-by-step explanation:
Given : A set of 200 test scores are normally distributed with a mean of 70 and a standard deviation of 5. 
i.e.  and
 and 
let x be the random variable that denotes the test scores.
Then, the probability that the students scored between a 60 and an 80 :

The number of students scored between a 60 and an 80 = 0.9544 x 200
= 190.88 ≈ 191
Hence , about 191 students scored between a 60 and an 80.
 
        
             
        
        
        
If it helps at all there is this graphing webpage called desmos.com it helps with tables and a lot of graphing stuff.