Solve.The temperature at 5:00 was -7°C. Four hours later, it was -15°C. What was the change in temperature?
A. 8°C
B. 22°C
C. -22°C
D. -8°C
Answer: D
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Solve the problem.Let angle POQ be designated ?. Angles PQR and VRQ are right angles. If ? = 38°, find the length of OV accurate to four decimal places. 
A. 1.6243 B. 0.7880 C. 0.6157 D. 1.2690
Solve.The length ? of a metal rod used in manufacturing cars must not differ from the standard s by more than 0.7 inches. The manufacturing engineers express this as 
If the standard s is 20.7, solve the inequality for the length ?. Express the answer in set-builder notation.
A. { ? 
}
B. { ? 
}
C. { ? 
}
D. { ? 
}
Find the slope of the line (if it exists) and the y-intercept (if it exists).4x - 6y = -6
A. Slope 
, y-intercept (0, 1)
B. Slope 
, y-intercept (0, -1)
C. Slope - 
, y-intercept (0, 1)
D. Slope - 
, y-intercept (0, -1)
Solve the problem.State University has a College of Arts & Sciences, a College of Business, and a College of Engineering. The percentage of students in each category are given by the following matrix.
The student population is distributed by class and age as given in the following matrix.
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How many female students are in the College of Business? How many male students are in the College of Arts & Sciences?
A. 501 students; 694 students
B. 603 students; 1429 students
C. 1276 students; 603 students
D. 694 students; 517 students