Simplify the expression.
?
?
A.
B.
C.
D.
E.
none of these
Answer: A
Mathematics
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Solve the inequality.x + 5 ? x - 2
A. 
B. (-?, ?)
C. ?
D. 
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Insert either < or > to make a true statement.0.2 ___ 0.5
A. < B. >
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Indicate whether the graph represents a one-to-one function.
A. Yes B. No
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Solve the problem.The surface area of a balloon is given by S(r) = 4?r2, where r is the radius of the balloon. If the radius is increasing with time t, as the balloon is being blown up, according to the formula 
find the surface area S as a function of the time t.
A. S(r(t)) = 
?t3
B. S(r(t)) = 
?t9
C. S(r(t)) = 
?t6
D. S(r(t)) = 
?t6
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