Solve the problem by using addition, subtraction, multiplication, or division as needed.A school bookstore ordered 134 copies of an English textbook. If the total cost was 
, find the cost of each book.
A. $13
B. $15
C. $1876
D. $12
Answer: B
Mathematics
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A. 8.7 × 105 B. 8.7 × 104 C. 8.7 × 10-4 D. 8.7 × 10-5
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Use trigonometric identities to solve each equation in the interval [0, 2?]sec2 x - 2 = tan2 x
A. ?
B. 
C. 
D. 
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Find the reference angle for the given angle.-402°
A. 132° B. 42° C. 138° D. 48°
Mathematics