Estimate the answer from the table or graph.The number of students at Alder High School who studied foreign languages in different years is shown in the bar graph. What is the total number of students who studied a foreign language in 2012? (Assume no student studied two foreign languages).
2006200820102012Year
A. 90 students
B. 150 students
C. 130 students
D. 170 students
Answer: C
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Find the indicated control limits.For a production process for which there is a great deal of data since its last modification, the population mean ? and the population standard deviation ? are assumed known. For such a process we have the following values for an src="https://sciemce.com/media/4/ppg__text0425190836__f1q44g3.jpg" alt="" style="vertical-align: -4.0px;" /> Find the central line, UCL, and LCL for the mean.
A. 16.0, 16.019, 15.981
B. 16.0, 16.049, 15.951
C. 16.0, 16.045, 15.955
D. 16.0, 16.017, 15.983
chart:central line = ?, UCL = ? + A?, LCL = ? - A?(The value A is found in the table of control chart factors). In a bottling factory, after bottling, the volume of juice in seven sample bottles is checked every 30 minutes. For this process, 
and
Find the product.(-3x - 5)(-4x + 4)
A. -7x2 + 8x + 8 B. 12x2 + 8x - 20 C. -7x2 + 8x - 20 D. 12x2 + 8x + 8
Find the commission earned or the rate of commission. Round money answers to the nearest cent if necessary.Sales: $285 Commission: $19.95
A. 0.7% B. 7% C. 9% D. 8%
Solve the problem.How many different license plates can be made using 2 letters followed by 4 digits selected from the digits 0 through 9, if digits may be repeated but letters may not be repeated?
A. 9027.77778 B. 3,407,040 C. 6,500,000 D. 6,760,000