Solve the problem.In a school survey, students showed these preferences for instructional materials. Answer the question. 
About how many students would you expect to prefer lectures in a school of 300 students?
A. About 60 students
B. About 18 students
C. About 108 students
D. About 54 students
Answer: D
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Evaluate the integral.
A. 
+ C
B. - 
+ C
C. 
+ C
D. - 
+ C
Solve the problem.A package of relief supplies is dropped and moves according to the parametric equations 
and y = -4.9t2, where distances are in meters and time is in seconds. Find the magnitude and direction of the velocity when 
A. 52 m/s, 321.2° B. 52 m/s, 141.2° C. 64 m/s, 141.2° D. 64 m/s, 321.2°
Solve the problem.Barbara Smith is an employee of Allied Manufacturing Company. She has an 8-hr workday and each day is paid $0.60 for each unit produced or the hourly rate, whichever is greater. Her hourly rate is $7.15 per hour. Last week she produced 90 units on Monday, 103 units on Tuesday, 82 units on Wednesday, 112 units on Thursday, and 98 units on Friday. What were her gross earnings for the week?
A. $302.20 B. $311.20 C. $289.20 D. $300.20
Multiply or divide as indicated.
A. -8i B. -8 C. 8i D. 8