If a tree casts a shadow of 5 ft 8 in. at the same time that a 6-ft 11-in. person casts a shadow of 4 ft 2 in., find the height of the tree (to the nearest inch).
?
A. 8 ft 4 in.
B. 11 ft 6 in.
C. 9 ft
D. 9 ft 5 in.
E. 9 ft 4 in.
Answer: D
Mathematics
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Solve the problem.Find the number of units that must be produced and sold in order to yield the maximum profit, given the following equations for revenue and cost:R(x) = 50x - 0.5x2C(x) = 4x + 3.
A. 49 units B. 47 units C. 46 units D. 54 units
Mathematics
Find the radius of convergence of the series. Select the correct answer.
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Mathematics
Find the value of the probability of the standard normal variable Z. Round your answer to four decimal places.
?
?
A. 0.8522 B. ?0.4728 C. ?0.1013 D. ?0.2266 E. ?0.3717
Mathematics
Sketch the graph of the function and its inverse on the same coordinate axes.f(x) = (x + 4)3
A. 
B. 
C. 
D. 
Mathematics