Solve.The monthly plan for your cellular telephone allows you to use 200 minutes a month. After calling customer service you find that you have used 42 minutes. You are planning to make two short personal calls of about 9 minutes each. Then, you need to make three important long business calls. If the calls are of equal length, approximately how much time will you have for each call? Round to the nearest whole number.
A. 50 minutes
B. 47 minutes
C. 45 minutes
D. 35 minutes
Answer: B
Mathematics
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For the curve r(t), write the acceleration in the form aTT + aNN.r(t) = (t + 6)i + (ln(sec t) - 9)j + 5k, -?/2 < t < ?/2
A. a = (sec2 t)T + (cos t)N B. a = (sec t tan t)T + (sec t)N C. a = (cos t)T + (cos t)N D. a = (csc t)T + (sec t)N
Mathematics
Determine whether the function is one-to- one. y = 6x
A) No, it isn't one-to-one. B) Yes, it is one-to-one.
Mathematics
Determine whether the given function is one-to-one. If it is one-to-one, find its inverse.f(x) = 7 - x
A. f-1(x) = 7 - x
B. f-1(x) = 
C. f-1(x) = x - 7
D. f-1(x) = x + 7
Mathematics
Write the product as a sum or difference containing only sines or cosines.sin(6?) sin(4?)
A. 
[sin(10?) + cos(2?)]
B. 
[cos(10?) - cos(2?)]
C. sin2(24?2)
D. 
[ cos(2?) - cos(10?)]
Mathematics