Rationalize the denominator and simplify. Assume that all variables represent positive real numbers.
A. 5 - 2
B. -5 - 2
C. 2
- 5
D. 5 + 2
Answer: C
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Calculate the Riemann sum 
?xi for the given data.f(x) = x + 4; P: 2 < 2.75 < 3.25 < 4.5 < 5.5; 
= 2, 
= 3, 
= 4.25, 
= 5
A. 28 B. 27.7216 C. 27.3125 D. 26.0125
Classify the number as a natural number, whole number, integer, rational number, irrational, and/or real number. The number may belong to more than one set.639
A. natural number, integer, real number B. whole number, integer, rational number, real number C. natural number, whole number, integer, rational number, real number D. natural number, whole number, integer
Evaluate the integral.
A. - 
csc 7t cot 7t - 
ln
+ 
+ C
B. 
csc 7t cot2 7t - 
ln
+ C
C. - 
csc 7t cot 7t + 
ln
+ C
D. - 
csc 7t cot 7t - 
ln
+ C
Write the polynomial in descending order of degree.x6 + x + 9x3 + 3 + 5x2
A. x6 + 9x3 + 5x2 + x + 3 B. 3 + x + 5x2 + 9x3 + x6 C. 9x3 + 5x2 + 3 + x6 + x D. x + 5x2 + 9x3 + x6 + 3