Answer:
surface area is 39 
Step-by-step explanation:
add the areas of each geometric figure making up the composite 3D figure.
first 3D figure 
2+2+6+6
=16---eq 1
from third 3D figure
4+4+10+5 
= 23
from 1 and 2 
16+23
= 39 
may be!! I'm not sure bout this answer 
 
        
             
        
        
        
Answer: I think its 2.09
Step-by-step explanation:
But i'm not sure.
 
        
             
        
        
        
The highest common factor of the numbers 210 and 308 is 4.
<h3>What is the highest common factor?</h3>
The highest factor of the two numbers which divides both the numbers is called as greatest common factor or HCF.
The highest common factor will be calculated by finding the factors of the two numbers. The factors of the two numbers are as follows:-
308   =  2 x  2   x  7  x  11
210   =  2  x  2   x  3  x  17
We can see that the 2  x  2  =  4 is the highest factor which is common between the two numbers 210 and 308. So 4 is the HCF which can divide both the numbers 210 and 308.
Therefore the highest common factor of the numbers 210 and 308 is 4.
To know more about HCF follow
brainly.com/question/219464
#SPJ1
 
        
             
        
        
        
Step-by-step explanation:
in ten minutes it goes 1 km in 60 minutes it goes 4 km
 
        
             
        
        
        
Answer:
40
Step-by-step explanation:
The range is the difference between the largest value and the smallest value in the data set.
minimum value = 21 and maximum value = 61
range = 61 - 21 = 40