Find the value of (f ? g)' at the given value of x.f(u) = tan 
, u = g(x) = x2, x = 6
A. -6?
B. 12
C. -36?
D. 6?
Answer: D
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Estimate the magnitude of the error involved in using the sum of the first four terms to approximate the sum of the entire series.
A. 
< 
B. 
< 1.23 × 10-2
C. 
< 1.37 × 10-3
D. 
< 4.12 × 10-3
Solve for the unknown variable.C = 2?r; C = 25.12, ? = 3.14
A. r = 4 B. r = 28.26 C. r = 157.75 D. r = 8
Solve using the substitution method. If the system has an infinite number of solutions, use set-builder notation to write the solution set. If the system has no solution, state this.5x - 2y = -1 x + 4y = 35
A. (3, 8) B. (2, 8) C. (3, 9) D. (2, 9)
Write an algebraic equation and use it to solve the problem.The three most prominent buildings in a city, Washington Center, Lincoln Galleria, and Jefferson Square Tower, have a total height of 1800 feet. Find the height of each building if Jefferson Square Tower is twice as tall as Lincoln Galleria and Washington Center is 320 feet taller than Lincoln Galleria.
A. Washington Center: 690 feet Lincoln Galleria: 370 feet Jefferson Square Tower: 740 feet B. Washington Center: 530 feet Lincoln Galleria: 210 feet Jefferson Square Tower: 1060 feet C. Washington Center: 600 feet Lincoln Galleria: 300 feet Jefferson Square Tower: 900 feet D. Washington Center: 420 feet Lincoln Galleria: 210 feet Jefferson Square Tower: 1170 feet