Simplify.78 + 15
A. 93
B. 92
C. 83
D. 94
Answer: A
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Solve the problem.A 2,000-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 8 L/min. The thoroughly mixed solution is drained from the tank at a rate of 8 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) = 0.004m + 160, m(0) = 50 (b) m = -39,950e0.004t + 320,000 B. (a) m'(t) = -0.004m + 20, m(0) = 50 (b) m = -39,950e-0.004t + 40,000 C. (a) m'(t) = -250m + 160, m(0) = 100,000 (b) m = 60,000e-0.004t + 320,000 D. (a) m'(t) = -0.004m + 160, m(0) = 100,000 (b) m = 60,000e-0.004t + 40,000
Solve.A cylindrical water storage tank has a diameter of 8 meters and a height of 9 meters. Find the capacity of this tank rounded to the nearest hundredth when necessary. Use ? ? 3.14.
A. 1808.64 m3 B. 16,277.76 m3 C. 452.16 m3 D. 576 m3
Evaluate.4(xy + 4)x for x = 3 and y = -2
A. -8 B. -32 C. 32 D. 16
Solve the problem.Show that sin(sin-1v - cos-1v) = 2v2 - 1
What will be an ideal response?