What property of whole-number multiplication justifies the equality?0 ? 38 = 0
A. Closure property
B. Commutative property
C. Multiplicative-identity property
D. Multiplication-by-zero property
Answer: D
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Use the Half-angle Formulas to find the exact value of the trigonometric function. tan 75°
A. 2 + 
B. -2 - 
C. 2 - 
D. -2 + 
Use a proportion to solve the problem.The ratio of the lengths of strings that play the notes D and B is 27 to 16. If a string 96 centimeters long plays a B, what is the length of the string that plays a D?
A. 123 centimeters B. 112 centimeters C. 162 centimeters D. 178 centimeters
Multiply and, if possible, simplify.(s + t + 6)(s + t - 6)
A. s2 + 2st + t2 - 36 B. s2 + 2st + 12s + 12t + t2 - 36 C. s2 - 2st - 12s - 12t + t2 + 36 D. s2 + t2 - 36
Determine the continuity of the function 
.
?
A. continuous except at 
B. continuous except at 
C. continuous except at 
D. continuous except at 
E. continuous everywhere