Graph the pair of parametric equations in the rectangular coordinate system.x = 3 tan t, y = 5 sec t; 0 ? t ? 2? 
A. 
B. 
C. 
D. 
Answer: C
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Find the difference.- 
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A. - 
B. - 
C. 
D. 
Solve the problem.A 2000-L tank is initially filled with a copper sulfate solution with a concentration of 50 g/L. A copper sulfate solution with a concentration of 20 g/L flows into the tank at a rate of 15 L/min. The thoroughly mixed solution is drained from the tank at a rate of 15 L/min.(a) Write an initial value problem for the mass of the copper sulfate.(b) Solve the initial value problem.
A. (a) m'(t) = -0.007m + 300, m(0) = 100,000 (b) m = 60,000e-0.007t + 40,000 B. (a) m'(t) = -0.007m + 20, m(0) = 50 (b) m = -39,950e-0.007t + 40,000 C. (a) m'(t) = 0.008m + 300, m(0) = 50 (b) m = -39,950e0.008t + 600,000 D. (a) m'(t) = -133.333m + 300, m(0) = 100,000 (b) m = 60,000e-0.007t + 600,000
Decide whether or not the set of ordered pairs defines a function.{(1, 4), (2, 5), (5, -3), (7, 5), (11, 8)}
A. No B. Yes
Use the order of operations to simplify the expression.
? 
? 9
A. 2
B. 1
C. 4
D. 1