Solve the problem.When making a long distance call from a certain pay phone, the first three minutes of a call cost $2.95. After that, each additional minute or portion of a minute of that call costs $0.25. Use an inequality to find the number of minutes one can call long distance for $4.95.
A. 11 minutes or fewer
B. 20 minutes or fewer
C. 2 minutes or fewer
D. 8 minutes or fewer
Answer: A
Mathematics
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Find at least three nonzero terms [including a0, at least two cosine terms (if they are not all zero) and at least two sine terms (if they are not all zero)] of the Fourier series for the given function.f(x) = 
A. f(x) = 
- 
B. f(x) = 
- 
C. f(x) = 
+ 
D. f(x) = 
+ 
Mathematics
Write the complex number in rectangular form.9(cos 180° + i sin 180°)
A. -9i B. 9i C. -9 D. 9
Mathematics
Multiply and simplify.
? 
A. - 
B. 
C. 
D. -12
Mathematics
Find the LCM.r2 + 12r + 36 and r2 + 6r
A. (r + 6)2 B. r(r + 6) C. r(r + 1)(r + 6) D. r(r + 6)2
Mathematics