Find the domain of the rational expression. 
A. {x|x is a real number and x ? 0}
B. {x|x is a real number and x ? 0 and x ? -4 and x ? 2}
C. {x|x is a real number and x ? -4 and x ? 2}
D. {x|x is a real number and x ? 0 and x ? -2 and x ? 4}
Answer: B
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Find 
.y = (x2 + 4x)cos x
A. 
- (sin x) ln (x2 + 4x)
B. (x2 + 4x)cos x
C. (x2 + 4x)cos x
D. 
- (sin x) ln (x2 + 4x)
Solve the problem. Express the answer in scientific notation to two decimals unless requested otherwise.If the distance from the earth to the sun were 84,000,000 miles. How long would it take a rocket, traveling at 2.4 × 103 miles per hour, to reach the sun? (Round to three places)
A. 3.5 × 104 hr B. 3.5 hr C. 3.5 × 102 hr D. 3.5 × 103 hr
Use properties of logarithms to condense the logarithmic expression. Write the expression as a single logarithm whose coefficient is 1. Where possible, evaluate logarithmic expressions.6 ln x - 
ln y
A. ln 
B. ln x6y4
C. ln x6
D. ln 
Indicate whether the statement is true or false.Some irrational numbers are integers.
A. true B. false