Find all values of ? in [0°, 360°) that satisfy the equation.2 sin 2? - 
= 0
A. {60°, 120°, 240°, 300°}
B. {30°, 150°, 210°, 330°}
C. {60°, 150°, 240°, 300°}
D. {30°, 60°, 210°, 240°}
Answer: D
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Find the vertices of the ellipse.3x2 + 5y2 - 24x + 60y + 213 = 0
A. (-6.2, 6), (-1.8, 6) B. (6.2, -6), (1.8, -6) C. (5.4, -6), (2.6, -6) D. (-2.6, 6), (-5.4, 6)
Write the decimal as a fraction or mixed number in lowest terms.643.9951
A. 64
B. 643
C. 6439
D. 64399
Solve the quadratic inequality. Write your answer in interval notation.-x2 ? 5
A. (-?, ?)
B. (-?, 0] ? [
, ?)
C. (-?, 0)
D. No solutions
The radioactive substance neptunium -139 decays to 72.85% of its original amount after 28 hours. How long (to the nearest hour) would it take for 37% of the original neptunium to be present? ? __________ hours
Fill in the blank(s) with the appropriate word(s).