Solve the problem.Assume that the elevation E, in feet, of a sag in a proposed route is given by  where x represents the horizontal distance in feet along the proposed route and 0 ? x ? 5000. For what x-values is the elevation 900 feet or more? Round your answer to the nearest foot.

A. x > 345 (feet)
B. x > 335 (feet)
C. x < 345 (feet)
D. x < 335 (feet)

Answer: D

Mathematics

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Evaluate the integral by using multiple substitutions. dx

A.  + C
B. (7 + sin2 x)3/2 + C
C. (7 + sin2 (x - 7))3/2 + C
D. (7 + cos2 (x - 7))3/2 + C

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Mathematics

Solve the problem.In 1980, the population of a city was 6.8 million. By 1992 the population had grown to 9.5 million. Find the average rate of change in population from 1980 to 1992..

A.  million per year
B.  million per year
C.  million per year
D.  million per year

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Mathematics

Evaluate.3

A.
B. - 
C.
D. - 

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Mathematics

Find the average rate of change of the function as x changes from a to b.h(x)= 4x2; a = 3, b = 5

A. -32 B. 8 C. -8 D. 32

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Mathematics