Multiply by powers of 10.4.7 × 1000
A. 4.700
B. 47,000
C. 0.0047
D. 4700
Answer: D
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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
Find the indicated tax rate.PercentPer $1006.4%
A. $0.64 B. $64.00 C. $6.4 D. 64.0
Solve the problem.Suppose that the population of a certain city during a certain time period can be approximated by 
where x is time in years since 2010. By sketching a graph of P(x), estimate during what time period the population of the city would be increasing.
A. Between 2010 and 2024 B. Between 2015 and 2045 C. Between 2010 and 2038 D. Between 2015 and 2038
Find the midpoint of the segment PQ.P(3, 1, -4), Q(9, 4, -2)
A. 
B. 
C. 
D. 