Solve the problem.In a chemistry class, 7 liters of a 4% silver iodide solution must be mixed with a 10% solution to get a 6% solution. How many liters of the 10% solution are needed?
A. 4.5 L
B. 2.5 L
C. 7.0 L
D. 3.5 L
Answer: D
Mathematics
You might also like to view...
Estimate error made by using the partial sum S4 as an approximation to the sum S of the entire series.
A. 8.33 x 10-14 B. -1.00 x 10-11 C. -1.11 x 10-10 D. -9.09 x 10-13
Mathematics
Express the number in standard notation.4.7980 × 105
A. 239.9 B. 4,798,000 C. 479,800 D. 47,980
Mathematics
Solve the problem. Express the answer as a percentage.A coin is biased to show 39% heads and 61% tails. The coin is tossed twice. What is the probability that the coin turns up tails on both tosses?
A. 61% B. 37.21% C. 22% D. 39%
Mathematics
Graph the solution of the system.-x + 5y < 15x ? -1
A. 
B. 
C. 
D. 
Mathematics