The line graph shows the recorded hourly temperatures in degrees Fahrenheit at an airport.
Estimate the temperature at 1:30 p.m.
A. 15°F
B. 18°F
C. -15°F
D. -18°F
Answer: B
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Solve the inequality and graph the solution set.8x + 4 < 9(x - 6)
A. {x|x < -58}
B. {x|x < 50}
C. {x|x > 58}
D. {x|x > -50}
Convert the Indo-Arabic numeral to the indicated form.3067; Egyptian
A. 
B. 
C. 
D. 
Find the exact value of the expression.cos 
cos 
- sin 
sin 
A. 0
B. 1
C. -1
D. 
Identify the problem with the method used to obtain a random sample.A magazine wishes to research the opinions of its readers on the topic of gun control. The editor of the magazine places a questionnaire in this month's issue of the magazine. The sample will consist of the readers who respond to the questionnaire.
A. People who are not regular readers of the magazine have no chance of being selected. B. The readers who respond to the questionnaire will not be representative of all readers of the magazine as those with stronger feelings on the subject are more likely to take the time to respond. C. People who read the magazine are not representative of all magazine readers.