Solve the problem.The table shows the population of a city over the past five years.
We used these data to develop the quadratic equation
, which models the population of the city y in millions in the year x, where x = 0 represents 1995, x = 1 represents 1996, and so on. Use the model to find the estimated population in the year 1998.
A. 1,490,000,000,000
B. 68,852,000
C. 71,628,000
D. 1,490,000
Answer: B
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Solve.The roof of a building is in the shape of the hyperbola where x and y are in meters. Determine the distance, w, between the outside walls.A = 10 m
A. 56 m B. 15 m C. 7.5 m D. 12 m
Solve the problem.The function E(x) = 0.0036x3 + 0.0055x2 + 0.19x + 1.76 gives the approximate total earnings of a company, in millions of dollars, where corresponds to 2006,
corresponds to 2007, and so on. This model is valid for the years from 2006 to 2010. Determine the earnings for 2007. Round to two decimal places if necessary.
A. $1.96 million B. $1.76 million C. $2.19 million D. $1.95 million
Let . Find the domain of the composite function.
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A.
B.
C.
D.
E.
Solve the problem.An airline charter service charges a fare per person of $350 plus $30 for each unsold seat. The airplane holds 75 passengers. Let x represent the number of unsold seats and write an expression for the total revenue R for a charter flight.
A. R(x) = (75 - x)(350 + 30x) or 26,250 + 2250x - 30x2 B. R(x) = 75(350 + 30x) or 26,250 + 2250x C. R(x) = (75 - x)(350 + 30x) or 26,250 + 1900x - 30x2 D. R(x) = x(350 + 30x) or 350x + 30x2