A hospital has a 4%-saline solution and an 12%-saline solution on hand. How much of each should be used to prepare 640 cm 3 of 7%-saline solution?
A. 240 cm 3 of a 12%-saline solution,
400 cm 3 of a 4%-saline solution.
B. 220 cm 3 of a 12%-saline solution,
420 cm 3 of a 4%-saline solution.
C. 400 cm 3 of a 12%-saline solution,
240 cm 3 of a 4%-saline solution.
D. 340 cm 3 of a 12%-saline solution,
300 cm 3 of a 4%-saline solution.
E. 440 cm 3 of a 12%-saline solution,
200 cm 3 of a 4%-saline solution.
Answer: A
You might also like to view...
Solve the problem.Suppose that f has a positive derivative for all values of x and that f(2) = 0. Which of the following statements must be true of the function g(x) = 
?
A. The graph of g crosses the x-axis at x = 2. B. The function g has a local minimum at x = 2. C. The graph of g has an inflection point at x = 2. D. The function g has a local maximum at x = 2.
5.48 - 4.12x - 1.2x = 18.78
A. {3.5} B. {-4.56} C. {-2.5} D. {6.43}
Solve the problem.A flare fired from the bottom of a gorge is visible only when the flare is above the rim. If it is fired with an initial velocity of 160 ft/sec, and the gorge is 336 ft deep, during what interval can the flare be seen?(h = -16t2 + vot + ho.)
A. 9 < t < 13 B. 0 < t < 3 C. 6 < t < 10 D. 3 < t < 7
List the elements in the sample space of the experiment.A 6-sided die is rolled. The sides contain the numbers 1, 2, 3, 4, 5, 6. List the sample space of rolling one die.
A. None of these B. {6} C. {36} D. {1, 2, 3, 4, 5, 6}