Determine the logarithm in base 10 of the given number to four decimal places.16.787-2
A. 2.4499
B. -5.6412
C. -8.1385
D. -2.4499
Answer: D
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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
Provide an appropriate response. Multiply and simplify: (2 + 3i)(5 - i)
A. 10 + 10i B. 7 + 13i C. 13 + 13i D. 10 + 16i
Convert to radical notation and simplify.27 -2/3
A. - 
B. - 9
C. 
D. 
Subtract. Write a mixed numeral for the answer.
A. 21
B. 20
C. 20
D. 21