The x intercepts are points where the graph cut the x axis. the x intercept are 2 and 1, when y is equal to zero. ( use factorization method) <span />
This cube would have a surface area of 726 inches squared. To get this you take the cube root of 1331 to get 11. This 11 is a side length so you use it to find the area of a side: 11*11 = 121. Then multiply this 121 by 6 because there are 6 sides to a cube and get 726.
Answer:
a)

b) 
Step-by-step explanation:
Part a
Let A the random variable that represent "The arrival time (minutes) for a daily flight from Boston to New York ". And we know that the distribution of A is given by:

We select our starting point a=0 representing 9:05 AM and the amount of minutes between 9:05 am to 9:55 am are 50 ans for this reason b =50
For ths uniform distribution the expected value is given by
where X is the random variable, and a,b represent the limits for the distribution. If we apply this for our case we got:

And the variance is given by:

And the standard deviation by definition is just the square root of the variance:

Part b
If we convert 9:30 AM to our scale we know that we have 25 minutes between 9:05 AM and 9:30 AM.
For this case we want to find this probability: 
And we can find this probability using the complement rule like this:

And we can use the cumulative distribution function given by:

And we got:
