Describe the situation with a linear inequality and then solve the inequality.ABC phone company charges $20 per month plus 
per minute of phone calls. XYZ phone company charges $16 per month plus 8¢ per minute of phone calls. How many minutes of phone calls should be made each month to make XYZ phone company a better deal?
A. more than 20 minutes
B. less than 200 minutes
C. more than 200 minutes
D. less than 20 minutes
Answer: B
Mathematics
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Solve the differential equation subject to the given condition. Note that y(a) denotes the value of y at t = a. 
= -6y, y(0) = 15
A. y = 6e-15t B. y = e-6t + 15 C. y = 15e-6t D. y = -15e6t
Mathematics
Use a CAS integration utility to evaluate the triple integral of the given function over the specified solid region.
over the tetrahedron bounded by the coordinate planes and the plane 
A. 
B. 939
C. 
D. 
Mathematics
Find the length of the following curve.y = 
, for -ln 3 ? x ? ln 3
A. 
B. 
C. 
D. 
Mathematics
Use the Factor Theorem to determine whether x - c is a factor of f(x).7x3 + 31x2 - 19x + 5; x + 5
A. Yes B. No
Mathematics