Give the signs of the trigonometric functions.sin (-309°)
A. -
B. +
Answer: B
Mathematics
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Provide an appropriate response.The half-life of a drug in the bloodstream is 9 hours. By what factor does the concentration of the drug decrease in 13 hours?
A. 0.05 B. 0.14 C. 2.72 D. 0.37
Mathematics
Find the midpoint of the line segment whose end points are given.(4, 7) and (7, -6)
A. (11, 1)
B. (-3, 13)
C. (
, 
)
D. (- 
, 
)
Mathematics
Rewrite the expression without using negative exponents. (Assume all variables represent nonzero real numbers.)
A. 
B. xy-12
C. x8y4
D. 
Mathematics
Divide. Write a mixed numeral for the answer whenever possible.-466 ÷ 11
A. -42
B. 42
C. -11
D. -42
Mathematics