Write the function in the form y = f(u) and u = g(x). Then find dy/dx as a function of x.y = cos4 x
A. y = cos u; u = x4; 
= - sin(x4)
B. y = u4; u = cos x; 
= 4 cos3 x sin x
C. y = cos u; u = x4; 
= - 4x3 sin(x4)
D. y = u4; u = cos x; 
= - 4 cos3 x sin x
Answer: D
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Solve the problem.A job pays a salary of 35,000 the first year. During the next 10 years, the salary increases by 3% each year. What is the salary for the 11th year? What is the total salary over the 11-year period? (Round to the nearest cent.)
A. $47,037.07; $401,235.78 B. $47,037.07; $448,272.85 C. $48,448.19; $401,269.11 D. $48,448.19; $496,721.03
Find the requested fraction.
= 
A. 
B. 
C. 
D. 
Decide whether the argument is valid or invalid, and give the form (of valid or invalid argument) that applies.If it's Tuesday, then this must be Paris.
This must not be Paris.
A. Invalid; fallacy of the inverse B. Invalid; fallacy of the converse C. Valid; reasoning by transitivity D. Valid; modus tollens
Use the indicated property to write an algebraic expression equivalent to the given expression.
t; associative
A. 
t
B. 
t
C. t
D. 
t