The answer to (7+x)=7x is equal to 8x+7.
Indegree-The number of inward directed graph edges from a given graph vertex in a directed
graph.
Outdegree-The number of outward directed graph edges from a given graph vertex in a directed
graph.
Answer:
a) The 90% confidence interval is 
b) The margin of error is 0.063.
Step-by-step explanation:
We have to construct a 90% confidence interval for the proportion of students enrolled in college or a trade school within 12 months of graduating from high school in 2013.
We have a sample of 160 students, and a proportion of:

The standard deviation is:

As the sample size is big enough, we use the z-value as statistic. For a 90% CI, the z-value is z=1.645.
Then, the margin of error is:

Then, the 90% confidence interval is:

Answer: 1,800 miles per minute
Step-by-step explanation: 30 * 60= 1,800