The following stem-and-leaf plot gives the heights of the 20 highest mountains in two continents. Use the plots to answer the question. 
Find the mean of the heights of the 20 highest mountains in Continent Y.
A. 19,050 feet
B. 19,720 feet
C. 18,900 feet
D. 18,840 feet
Answer: B
Mathematics
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Evaluate the integral by using multiple substitutions.
dx
A. 
(1 + sin2 x)3/2 + C
B. 
+ C
C. (1 + cos2 (x - 10))3/2 + C
D. 
(1 + sin2 (x - 10))3/2 + C
Mathematics
Solve.A new amusement park will be constructed on 875 acres of land. How many square miles is 875 acres? Round to the nearest hundredth.
A. 560,000 mi2 B. 56,000 mi2 C. 1.37 mi2 D. 1.4 mi2
Mathematics
Evaluate the indicated partial derivative at the given point.z = 4xy - x2, 
A. 22 B. -69 C. -26 D. -14
Mathematics
Use the fundamental identities and simplify the expression to get a numerical value.cos x (csc x - sec x) - cot x
A. cos2x - tan2x B. 1 C. 0 D. -1
Mathematics