Answer:
(f o g)(-2)= 11
Step-by-step explanation:
 
        
                    
             
        
        
        
We need to find out how many adults must the brand manager survey in order to be 90% confident that his estimate is within five percentage points of the true population percentage.
From the given data we know that our confidence level is 90%. From Standard Normal Table we know that the critical level at 90% confidence level is 1.645. In other words,  .
.
We also know that E=5% or E=0.05
Also, since,  is not given, we will assume that
 is not given, we will assume that  =0.5. This is because, the formula that we use will have
=0.5. This is because, the formula that we use will have  in the expression and that will be maximum only when
 in the expression and that will be maximum only when  =0.5. (For any other value of
=0.5. (For any other value of  , we will get a value less than 0.25. For example if,
, we will get a value less than 0.25. For example if,  is 0.4, then
 is 0.4, then  and thus,
 and thus,  .).
.).
We will now use the formula

We will now substitute all the data that we have and we will get



which can approximated to n=271.
So, the brand manager needs a sample size of 271
 
        
             
        
        
        
We are given that:
side length = 8 3/2 inches = 9.5 inches
the rule for the area is: A = s^2
Substitute with the side length in the rule given to get the area as follows:
Area = s^2 = (9.5)^2 = 90.25 inch^2
        
             
        
        
        
Answer:
11.2$ 
Step-by-step explanation:
Kristina and Melissa had 32$ at total 
● 32$ => 100% 
They have spent 35% 
Let x be that amount 
● x => 35% 
●32 => 100
● x => 35 
● x = (35×32)/100 = 11.2$ 
They have spent 11.2$ 
 
        
                    
             
        
        
        
Answer:
a^2+b^2=a(2)^1.5
Step-by-step explanation:
im not sure, just seems right