Answer:
35
Step-by-step explanation:
The way I know is because I memorized every square up to 33.
BUT that's probably not helpful to you. 
Remember that every perfect square has an odd number of factors. I'm not going to list them all out, but the factors of 35 are 1, 5, 7, and 35, giving it an even number of factors. All the rest have an odd number of factors because of the property of a perfect square: a number times itself gives a perfect square, but that number only counts as 1 factor.
 
        
             
        
        
        
Answer:
-1.8
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:

Step-by-step explanation:



 
        
                    
             
        
        
        
Answer:
Total number of students surveyed about their mode of transportation to school is 400.
Step-by-step explanation:
Here, given student who uses car as their mode of transport = 120 students
We have to find the total number of students who are surveyed.
Also, since complete circle represents 100% of data,
Total students who uses at least one mode of transport out of foot, bicycle, bus or car let it be x students.
Total percentage of students that uses bus, bicycle and on foot = (20 +15+35)% = 70%
Thus, percentage of students that uses car = 100 - 70 = 30%
Thus, 30 % of total students = 120 
Mathematically,  30% of x = 120 
Solving for x, we get,



Thus, total number of students surveyed about their mode of transportation to school is 400.
 
        
             
        
        
        
Part 1:
3,0,-2,7 
Part 2:
A,C,D