Solve.
- 
= 
A. 
, - 
B. 
, - 
C. 
D. 
Answer: D
Mathematics
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Write the function in the form y = f(u) and u = g(x). Then find dy/dx as a function of x.y = cos3 x
A. y = u3; u = cos x; 
= 3 cos2 x sin x
B. y = cos u; u = x3; 
= - sin(x3)
C. y = u3; u = cos x; 
= - 3 cos2 x sin x
D. y = cos u; u = x3; 
= - 3x2 sin(x3)
Mathematics
Solve the problem.Jack is currently driving into a headwind (17% decrease). If his normal mileage is 29 mpg, what will his car's mileage be in the headwind? Round your answer to the nearest tenth.
A. 24.1 mpg B. 29 mpg C. 46 mpg D. 7.3 mpg
Mathematics
Write as a percent. Round to the nearest hundredth of a percent when necessary.
A. 18.75% B. 53.33% C. 5.33% D. 1.88%
Mathematics
Simplify the complex fraction.
A. 
B. 12
C. 1
D. 
Mathematics