Solve the problem.A stack of poles has 21 poles in the bottom row, 20 poles in the next row, and so on, with 10 poles in the top row. How many poles are there in the stack?
A. 160
B. 186
C. 176
D. 196
Answer: B
Mathematics
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Evaluate the indicated double integral over R.
; R = {(x, y): 0 ? x ? 1, 0 ? y ? 1}
A. 
(e5 - e3 - e2 + 1)
B. 
(e5 - e3 - e2 - 1)
C. 
(e5 - e3 - e2 + 1)
D. 
(e5 - e3 - e2 - 1)
Mathematics
Suppose that the functions f and g and their derivatives with respect to x have the following values at the given values of x. Find the derivative with respect to x of the given combination at the given value of x.
g(x + f(x)), x = 3
A. -24 B. -28 C. 21 D. -4
Mathematics
Solve the problem.A tree casts a shadow 36 m long. At the same time, the shadow cast by a 49-centimeter tall statue is 90 cm long. Find the height of the tree. Round to the nearest tenth.
A. 66.1 m B. 18.1 m C. 19.6 m D. 64.6 m
Mathematics
Graph.y = (x - 5)2 
A. 
B. 
C. 
D. 
Mathematics