Solve the problem.Which of the lines in the picture are lines of symmetry of the given figure?
A. l, m, n and o
B. m and o
C. l and n
D. Only m
Answer: B
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Evaluate the numerical value of the formula with the given replacement values.C = 
A = 128, B = 8
A. 8 B. 64 C. 512 D. 32
Solve the problem.A controlled placebo experiment is said to be double-blind when
A. the members of the control group are told they are in the treatment group and vice versa. B. none of the scientists conducting the study know which patients are in the control group and which patients are in the treatment group. C. neither the members of the control group or the members of the treatment group know to which of the two groups they belong. D. neither the subject nor the scientists conducting the study know which individuals are in the treatment group and which are in the control group. E. none of these
Solve the problem.A summer camp wants to hire counselors and aides to fill its staffing needs at minimum cost. The average monthly salary of a counselor is $2400 and the average monthly salary of an aide is $1100. The camp can accommodate up to 45 staff members and needs at least 30 to run properly. They must have at least 10 aides, and may have up to 3 aides for every 2 counselors. How many counselors and how many aides should the camp hire to minimize cost?
A. 35 counselors and 10 aides B. 12 counselors and 18 aides C. 27 counselors and 18 aides D. 18 counselors and 12 aides
Establish the identity.cos(3x) = cos3 x - 3 sin2 x cos x
What will be an ideal response?