Solve the problem.In a chemistry class, 5 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. 2.5 L
B. 5.0 L
C. 3.5 L
D. 1.5 L
Answer: A
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Solve the problem.What is the minimum force required to prevent a ball weighing 28.2 lb from rolling down a ramp which is inclined 12.1° with the horizontal? Round to the nearest tenth.
A. 3 lb B. 13.8 lb C. 27.6 lb D. 5.9 lb
Use the rules of exponents to simplify. Write the answer with positive exponents. Assume that all variables represent positive values.(x2/3)2/7
A. x20/21 B. x2/3 ? x2/7 C. x4/21 D. x4/7
Multiply, then simplify the product. Assume that all variables represent positive real numbers.(
+ 1)(
- 1)
A. 10 - 2
B. 10
C. 10 + 2
D. 12
Find the domain and range of the function.y = (x - 9)2 + 6
A. Domain: [9, ?); Range: [-?, -9) B. Domain: (-?, ?); Range: [9, ?) C. Domain: [6, ?); Range: [-?, 6) D. Domain: (-?, ?); Range: [6, ?)