Solve.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. 7.0 L
C. 2.5 L
D. 3.5 L
Answer: D
Mathematics
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Convert 6 meters per minute to kilometers per hour.
A. 100 kilometers per hour B. 0.36 kilometers per hour C. 6 kilometers per hour D. 66 kilometers per hour
Mathematics
Multiply.(7
+ 6 )(
- 3)
A. 7x - 15
- 18
B. 7x - 15
+ 18
C. 7x + 27
- 18
D. 7x + 15
- 18
Mathematics
Graph the linear function that models the data given in the table below. ? x -1 0 1 2 3 4 5 y -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5
A. ?
B. ?
C. ?
D. ?
E. ?
Mathematics
In 2006, the population of a certain county was 7 million. The population is projected to increase to 9 million by 2020. Find the projected percent increase in the population of the county from 2006 to 2020. Round to the nearest tenth of a percent.
A) 77.8% B) 22.2% C) 28.6% D) 12.9% E) 7.8%
Mathematics