Provide an appropriate response.Subtract: 5 h 20 min - 3 h 30 min
A. 2 h 10 min
B. 2 h 50 min
C. 1 h 90 min
D. 1 h 50 min
E. none of the above
Answer: D
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Determine whether the two pairs of numbers are proportional.12.56, 3.14 and 3.14, 0.785
A. Yes B. No
Provide an appropriate response.Find the polar coordinates of a vector in standard notation that has rectangular coordinates of (-2, 4). Report the angle coordinate in radians.
A. (4.5, -63.4°) B. (3.5, 0.03°) C. (-4.5, 63.4°) D. (-4.5, -26.6°)
Provide an appropriate response.Find the value of sin ? if cos ? = 
and tan ? < 0.
A. -
B. - 
C. - 
D. - 
Solve the problem.When making a telephone call using a calling card, a call lasting 6 minutes cost $0.95. A call lasting 15 minutes cost $1.85. Let f(x) be the cost of making a call lasting x minutes using a calling card. Write a linear function that models the cost of a making a call lasting x minutes.
A. f(x) = 0.1x + 0.35
B. f(x) = -0.1x + 1.55
C. f(x) = 0.1x - 13.15
D. f(x) = 10x - 