Evaluate.12 + 14
A. 26
B. -2
C. -26
D. 2
Answer: A
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Tank A contains 250 lbs of salt dissolved in 1000 gal of water. Tank B contains 300 lbs of salt dissolved in 1000 gal of water. The mixture from tank A is pumped to tank B at the rate of 400 gal per hr, while the mixture from tank B is pumped to tank A at the same rate. Assume that the mixture in each tank is uniform by stirring. Let A(t ) and B(t ) be the amount of salt in tanks A and B after t hours, respectively.
(a) Draw a two-compartment model for A(t ) and B(t ) . (b) Use the initial conditions A(0) = 250 and B(0) = 300 to solve for A and B. (c) What are the equilibrium values of A and B?
Give the meaning of the metric prefix.deka
A. Tenth B. Hundred C. Ten D. Hundredth
Find the area of the geometric figure.
A. 14
sq units
B. 51
sq units
C. 11
sq units
D. 28
sq units
Convert to an exponential equation.log100.00001 = -5
A. 0.00001-5 = 10 B. -510 = 0.00001 C. 10-5 = 0.00001 D. 0.0000110 = -5