Write interval notation for the given set or graph.{x ? -1 < x < 3}
A. (-1, 3)
B. (-1, 3]
C. [-1, 3]
D. [-1, 3)
Answer: A
Mathematics
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Write the first five terms of the geometric sequence with the given information.The first term is 7 and the common ratio is 
.
A. 
, 
, 
, 
, 
B. 7, 21, 63, 189, 567
C. 7, 
, 
, 
, 
D. 7, 
, 
, 8, 
Mathematics
Solve the equation for the indicated variable.A = 
?r2 for r
A. r = 
B. r = ± 
C. r = 3
D. r = ± 
Mathematics
Simplify. Assume that all variables represent positive real numbers.
A. 3(
)
B. -3a2b(
)
C. 3ab(
)
D. 3ab(
)
Mathematics
A point on the terminal side of an angle ? is given. Find the exact value of the indicated trigonometric function of ?.(-3, -2)Find cot ?.
A. 
B. - 
C. 
D. 
Mathematics