Find the exact value of the expression if ? = 30°. Do not use a calculator.f(?) = cos ?Find 7f(?).
A. - 
B. 
C. - 
D. 
Answer: B
Mathematics
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Write the expression as the logarithm of a single quantity.ln (x2 - 81) - ln (x + 9)
A. ln (x2 - 9) B. ln (x - 81) C. ln (x - 9) D. ln (x + 9)
Mathematics
Test the series for convergence or divergence.
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Mathematics
Simplify. Express your answer with positive exponents. Assume that all variables are nonzero.(3x-8y9z-9)-3
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.If a rocket is propelled upward from ground level, its height in meters after t seconds is given by 
During what interval of time will the rocket be higher than 176.4 m?
A. 3 < t < 6 B. 6 < t < 6 C. 6 < t < 9 D. 0 < t < 3
Mathematics