Find the derivative at each critical point and determine the local extreme values.y = x(9 - x2)
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Solve the problem.Suppose that R ={(x, y): 0 ? x ? 7, 0 ? y ? 7},R1 = {(x, y): 0 ? x ? 7, 0 ? y ? 6}, andR2 = {(x, y): 0 ? x ? 7, 6 ? y ? 7}. Suppose, in addition, that
dA = 7, 
dA = 9, and 
dA = 2.Use the properties of integrals to evaluate 
dA.
A. 9 B. 18 C. 11 D. 7
Mathematics
The graph of a function that shows constant percentage decay is concave up.
Answer the following statement true (T) or false (F)
Mathematics
Determine whether the given equation is a rational function.f(x) = 
A. Yes B. No
Mathematics
Evaluate the expression.r = 
, v = 
, w = 
v ? w
A. 4
B. 
C. -49
D. 
Mathematics