Use a calculator to approximate the logarithm to four decimal places.log9 8
A. 0.9464
B. -0.9464
C. 1.8928
D. 1.0566
Answer: A
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Determine whether or not the number is written in scientific notation.45.39 × 1011
A. in scientific notation B. not in scientific notation
An elderly rancher died and left her estate to her three children. She bequeathed her 17 prize horses in the following manner: 1/2 to the eldest, 1/3 to the second child, and 1/9 to the youngest.
?
The children decided to call in a very wise judge to help in the distribution of the rancher's estate. They informed the judge that the 17 horses were not of equal value. The children agreed on a ranking of the 17 horses (#1 being the best and #17 being a real dog of a horse). They asked the judge to divide the estate fairly so that each child would receive not only the correct number of horses but horses whose average rank would also be the same. For example, if a child received horses 1 and 17, the number of horses is two and the average value is 
. How did the judge apportion the horses?
?
A. Eldest: 2, 5, 4, 7, 11, 12, 13, 14, and 15; middle: 3, 6, 8, 9, 10, and 16; youngest: 1 and 17.
B. Eldest: 2, 3, 4, 8, 11, 12, 13, 14, and 17; middle: 5, 6, 7, 9, 10, and 16; youngest: 1 and 15.
C. Eldest: 1, 2, 4, 7, 11, 12, 13, 14, and 15; middle: 5, 6, 8, 9, 10, and 16; youngest: 3 and 17.
D. Eldest: 2, 3, 4, 7, 11, 12, 13, 14, and 15; middle: 5, 6, 8, 9, 10, and 16; youngest: 1 and 17.
E. Eldest: 2, 3, 4, 7, 11, 12, 13, 14, and 17; middle: 5, 6, 8, 9, 10, and 16; youngest: 1 and 15.
Solve.The pH of a solution ranges from 0 to 14. An acid has a pH less than 7. Pure water is neutral and has a pH of 7. The pH of a solution is given by 
where x represents the concentration of the hydrogen ions in the solution in moles per liter. Find the pH if the hydrogen ion concentration is 
A. 3 B. 11 C. -11 D. -3
Use the horizontal-line test to determine whether the function is one to one.
A. No B. Yes