Perform the indicated operation. Express the solution in scientific notation.
A. 8.6 × 10-10
B. 8.6 × 104
C. 4.3 × 104
D. 4.3 × 10-10
Answer: D
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You sell books, and the price you charge a single customer for each book depends on the number purchased. If a customer orders B books then you charge 
dollars for each book. You have to pay the wholesaler $162 for each book you sell.
? A: Write a formula that gives your income I, in dollars, if you sell B books. (For income, you do not consider the price you pay for each book.)B. Write a formula that gives your net profit P, in dollars, if you sell B books. (For net profit you must consider both income and cost.)C: What number of books sold will provide you with the most profit? What will be an ideal response?
Find the indicated probability.The table below shows the soft drinks preferences of people in three age groups.
If one of the 255 subjects is randomly selected, find the probability that the person drinks root beer given that they are over 40.
A. 
B. 
C. 
D. None of the above is correct.
Find the exact value of the trigonometric expression without the use of a calculator.sin 105°
A. 
B. - 
C. - 
D. 
Refer to the figure to classify the statement as true or false.
and 
are parallel lines.
A. True B. False