Choose the most reasonable unit of measure.One strand of hair: 1 
(mg, g, or kg)
A. g
B. kg
C. mg
Answer: C
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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 1300 feet or more? Round your answer to the nearest foot.
A. x < 893 ft or x > 5959 ft B. x < 893 ft or x > 5969 ft C. x < 883 ft or x > 5959 ft D. x < 883 ft or x > 5969 ft
Write interval notation.{x?-4 ? x < 0}
A. [-4, 0) B. (-4 ,0] C. (-4, 0) D. [-4, 0]
The triangles are similar. Find the missing length x and the missing angles A, B, C. 
A. x = 9 units; A = 91°; B = 35°; C = 54° B. x = 9 units; A = 54°; B = 35°; C = 91° C. x = 18 units; A = 91°; B = 35°; C = 54° D. x = 18 units; A = 35°; B = 91°; C = 54°
Solve the problem.Shari enjoyed services at a spa. The total cost of these services was $310. If she decides to leave a 9% tip, how much should the tip be? Round your answer to the nearest cent.
A. $24.80 B. $27.90 C. $279.00 D. $31.00