Evaluate the derivative.f(x) = 5 tanh-1(cos x)
A. - 
B. - 
C. - 
D. ln
sin x
Answer: A
Mathematics
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Find the requested quantity. Write the answer in simplest form.Find the perimeter.
A. 60
feet
B. 7
feet
C. 
feet
D. 31
feet
Mathematics
Solve the problem.The temperature at 4 p.m. on January 22 was -10° Fahrenheit. By 9 p.m. the temperature had risen 24 degrees. Find the temperature at 9 p.m.
A. 14° B. -34° C. -14° D. 34°
Mathematics
Find the center and radius of the sphere.2x2 + 2y2 + 2z2 - x + y - z = 9
A. C
, a =
B. C
, a = 
C. C
, a = 
D. C
, a = 
Mathematics
Divide and simplify. Assume variables do not cause any denominators to equal 0.
÷ 
A. 
B. 
C. 
D. 
Mathematics