Complete the identity.
= ?
A. 2 sin (7?) sin (3?)
B. 2 cos (7?) sin (3?)
C. tan (7?)
D. 2 sin (14?)
Answer: C
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Find fx, fy, and fz.f(x, y, z) = x2y + y2z + xz2
A. fx = 2xy + z2; fy = x2 + yz; fz = y2 + xz B. fx = 2xy; fy = x2 + 2yz; fz = y2 + 2xz C. fx = 2xy + z2; fy = x2 + 2yz; fz = y2 + 2xz D. fx = 2y + z2; fy = x2 + 2z; fz = y2 + 2x
Solve.Use the Maclaurin expansion of ex to find 
.
A. ? B. 0 C. 1 D. -1
Find the inverse of the function.f(x) = -x2 + 12, x ? 0
A. f-1(x) = - 
B. f-1(x) = 
C. f-1(x) = 
D. f-1(x) = x2 + 12
Solve the problem.Find an exponential function to model the data below and use it to predict what income the company should expect in its seventh year of operation. Round to the nearest tenth when necessary. 
A. 1.83 million B. 0.2 million C. 12.8 million D. 128 million