Answer:
 1.) 1/4 
 2.) 5/12 i am not sure about this one 
Step-by-step explanation:
1.) Chance of tales: 
 Chance of even number: 3/6 or 1/2
 Multiply: (1/2)(1/2) = 1/4
 
        
             
        
        
        
Answer: A 
Step by step explanation:
        
             
        
        
        
7.5 ft 
I dont think so.. I think thats the answer
 
        
             
        
        
        
The variance of a constant is zero. Rule 2. Adding a constant value, c, to a random variable does not change the variance, because the expectation (mean) increases by the same amount. ... Multiplying a random variable by a constant increases the variance by the square of the constant.