For the algebraic expression, tell whether the portion named is a term or a factor.4a(a - b) (a - b) is a ________
A. term
B. factor
Answer: B
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Solve.The land surface of the earth is 57,900,000 square miles. Of this, 19,200,000 square miles are forested. Using scientific notation, express the number of square miles that is not forested.
A. 38.7 × 106 square miles B. 3.87 × 106 square miles C. 3.87 × 108 square miles D. 3.87 × 107 square miles
Given the set sketched on the number line, identify the type of interval (open, closed, half-open, open infinite, closed infinite), write the set using set-builder notation, and write the set using interval notation.
A. half-open interval; {x|-9 < x ? -3}; (-9, -3] B. closed interval; {x|-9 ? x ? -3}; [-9, -3] C. half-open interval; {x|-9 ? x < -3}; [-9, -3) D. open interval; {x|-9 < x < -3}; (-9, -3)
Evaluate by finding the least common denominator. Simplify if possible.- 
+ 
A. - 
B. 
C. - 
D. 
Solve the inequality graphically. Express the solution in set-builder notation.
< - 
A. {
x < - 
}
B. {
x > 
}
C. {
x > 
}
D. {
x > - 
}