Provide an appropriate response.State whether the following situation represents direct variation, inverse variation, or neither, and explain why: The cost of mailing a letter in the United States and the distance that it travels.
What will be an ideal response?
Neither; the cost of mailing a letter in the United States is not affected by the distance it travels.
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Verify that the equation is an identity.sec2 
= 
What will be an ideal response?
Solve the problem.Suppose that the number of inhabitants of Country A is given by 
million, and the number of inhabitants of Country B is given by 
million, where x is the number of years since 2010. When the number of inhabitants of Country A equals the number of inhabitants of Country B, how many people inhabit each country?
A. 849,072,000 people B. 848,346,000 people C. 849,798,000 people D. 847,620,000 people
Solve the problem.Alan is building a garden shaped like a rectangle with a semicircle attached to one short side. If he has 80 feet of fencing to go around it, what dimensions will give him the maximum area in the garden?
A. width = 
? 11.2, length = 22.4
B. width = 
? 14.4, length = 21.5
C. width = 
? 22.4, length = 11.2
D. width = 
? 22.4, length = 28.8
Write the decimal as a percent.0.3
A. 300% B. 30% C. 0.03% D. 0.3%