Find the axis of symmetry of the given function.f(x) = -2x2 + 7x + 4
A. x = 
B. x = 
C. x = - 
D. x = - 
Answer: B
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Find the flux of the curl of field F through the shell S.F = -5zi - 3xj - 3yk ; S: r(r, ?) = r cos ?i + r sin ?j + 5rk, 0 ? r ? 5 and 0 ? ? ? 2?
A. -75? B. 75? C. 0 D. -75
Use Pascal's triangle to answer the question.Guess a formula for the sum of the entries in the nth row of Pascal's triangle.
A. 2n + 1 B. 2n-1 C. 2n - 1 D. 2n
Find the expected value.Mr. Cameron is sponsoring an summer concert. He estimates that he will make $300,000 if it does not rain and make $60,000 if it does rain. The weather bureau predicts the chance of rain is 0.34 for the day of the concert. An insurance company is willing to insure the concert for $150,000 against rain for a premium of $30,000. If he buys this policy, what are his expected earnings from the concert?
A. $180,000 B. $300,000 C. $270,000 D. $239,400
Determine whether the pair of fractions is equivalent.
and 
A. equivalent B. not equivalent