Solve the equation on the interval 0 ? ? < 2?. sin ? + 
cos ? = -1
A. 
B. 
C. 
D. 
Answer: D
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. 800 years C. 1600 years D. 1400 years
Mathematics
Given that a 95% confidence interval is (6.5, 12.5), we can state that we are 95% confident that the true population mean is between 6.5 and 12.5.
Answer the following statement(s) true (T) or false (F)
Mathematics
Simplify.6.3 × 4.7 + 0.9 ÷ 7.2
A. 3.15 B. 29.735 C. 4.2375 D. 4.9
Mathematics
Factor completely. If the polynomial is prime, state this.x2 - 10x + 25
A. (x - 5)(x + 5) B. Prime C. (x - 5)2 D. (x + 5)2
Mathematics