Solve.
+
= -1
A. - ±
i
B. ±
i
C. - ±
D. ±
Answer: A
Mathematics
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Solve the problem.Find the half-life of the radioactive element radium, assuming that its decay constant is with time measured in years.
A. 2308 years B. 1600 years C. 800 years D. 1400 years
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Find the product of the complex number and its conjugate.i
A. -1 B. i C. 1 D. -i
Mathematics
Simplify the expression.(10 + 8
)(10
+ 7
)
A. 480 + 150
B. -80 + 150
C. 100 + 56
+ 150
D. 100 + 56
Mathematics
Solve.The printed matter on a 10 by 22 centimeter page of a book must cover 64 square centimeters. If all margins are to be the same width, how wide should the margins be?
A. 1 cm B. 6 cm C. 4 cm D. 3 cm
Mathematics