Determine the direction angle ? of the vector, to the nearest degree.r = 4i + 8j
A. 63°
B. 27°
C. 207°
D. 243°
Answer: A
Mathematics
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Solve the problem. Express your answer in scientific notation, rounding as needed.The national debt of a small country is $6,400,000,000 and the population is 2,315,000. What is the amount of debt per person?
A. $2.76 × 103 B. $2.76 × 104 C. $2.76 × 102 D. $2.76 × 106
Mathematics
Find f(x) and g(x) such that h(x) = (f ? g)(x).h(x) = 
+ 9
A. f(x) = x, g(x) = 
+ 9
B. f(x) = x + 9, g(x) = 
C. f(x) = 
, g(x) = 9
D. f(x) = 
, g(x) = 
+ 9
Mathematics
Simplify.13!
A. 8.71782912e+10 B. 1716 C. 6.2270208e+09 D. 479,001,600
Mathematics
Graph the system of inequalities.x2 + y ? 2x2 - y ? 4
A. 
B. 
C. 
D. 
Mathematics