Solve the problem.A reflecting telescope contains a mirror shaped like a paraboloid of revolution. If the mirror is 20 inches across at its opening and is 3 feet deep, where will the light be concentrated?
A. 8.3 in. from the vertex
B. 0.2 in. from the vertex
C. 0.5 in. from the vertex
D. 0.7 in. from the vertex
Answer: D
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Determine whether any of the listed candidates has a majority.Four candidates running for congress receive votes as follows:Alberts: 44,935, Brown: 12,255, Cassimatis: 32,680, D'Amico: 28,595
A. Yes B. No
In a school survey, students showed these preferences for instructional materials. Answer the question.
About how many students would you expect to prefer films in a school of 550 students?
A. About 66 students B. About 99 students C. About 110 students D. About 20 students
Simplify the expression.-3 + 4(8 - 2m)
A. 29 + 8m B. 32 - 8m C. 29 - 2m D. 29 - 8m
Evaluate the expression. Round to five decimal places when necessary.(-12)-4
A. - 
B. 
C. 
D. - 