Fill in the blank with one of the words or phrases listed below.
A(n) 
is one whose numerator is less than its denominator.
A. mixed number
B. complex fraction
C. proper fraction
D. improper fraction
Answer: C
Mathematics
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P( X > 0.6)
The random variable X has the probability density function ( ) [ ) 0.2 0.2 0, f x e? = over ? . Compute the following quantities.
Mathematics
Simplify the expression.167/4
A. 16,384
B. 128
C. 131
D. 
Mathematics
The letters x and y represent rectangular coordinates. Write the equation using polar coordinates (r, ?).x2 + y2 - 4x = 0
A. r sin2 ? = 4 cos ? B. r cos2 ? = 4 sin ? C. r = 4 sin ? D. r = 4 cos ?
Mathematics
Use a coterminal angle to find the exact value of the expression. Do not use a calculator.sin 390°
A. 
B. 
C. 
D. 2
Mathematics