The surface of a polyhedron can be found by using the following equation:<span>1. Draw a net of the polyhedron.
</span><span>2. Calculate the area of each face.<span>
</span></span><span><span>3. Add up the area of all the faces.</span></span>
        
             
        
        
        
Answer:
slope: -3
y-int: -1
Step-by-step explanation:
 
        
             
        
        
        
We are given that the cost of each shirt = $12.25
It is given that she bought total 'x' shirts, each of cost $12,25.
So, the cost of 'x' shirts is  dollars
Also, there is a shipping charge of $3.99
So, the total cost of 'x' shirts is 
Since, the shirts cost her total $77.49.
We have the equation,
12.25x + 3.99 = 77.49
 
        
             
        
        
        
Answer:
For the 99th percentile, we have X = 206 seconds.
Step-by-step explanation:
Problems of normally distributed samples can be solved using the z-score formula.
In a set with mean  and standard deviation
 and standard deviation  , the zscore of a measure X is given by:
, the zscore of a measure X is given by:

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.
In this problem, we have that:

99th percentile:
Value of X when Z has a pvalue of 0.99. So we use 




For the 99th percentile, we have X = 206 seconds.