Middletown is designing a new high-speed rail system to connect Downtown, the Airport, and the Mall. The elevated tracks for the rail system will run along the existing roads, that run on a grid as shown below. In addition, a central switching station must be located at one of the intersections.
What is the length of the optimal network?
A. 7 blocks
B. 8 blocks
C. 5 + 
blocks
D. 9 blocks
E. none of these
Answer: B
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Provide the requested response.Suppose that a polynomial function of degree 4 with rational coefficients has 6, 4, 5i as zeros. Find the other zero.
A. 
i
B. - 5i
C. -6
D. 5- i
Determine independence. Answer Yes or No.The table shows the political affiliation of voters in one city and their positions on stronger gun control laws. ?Stronger Gun Control 
Are party affiliation and position on gun control laws independent?
A. Yes B. No
Use a calculator to find 
.
?
Please round the answer to the nearest ten-thousandth.
?
A. -0.7893 B. -0.7563 C. -0.7863 D. -0.7463 E. -0.7562
Solve the problem.The weight of a person on or above the surface of the earth varies inversely as the square of the distance the person is from the center of the earth. If a person weighs 180 pounds on the surface of the earth and the radius of the earth is 3900 miles, what will the person weigh if he or she is 125 miles above the earth's surface? Round your answer to the nearest hundredth of a pound.
A. 170.39 lb B. 168.99 lb C. 168.49 lb D. 169.39 lb