Find projv u.v = 7i - 3j + k, u = -4j + 3k
A. - 
j + 
k
B. 
i - 
j + 
k
C. - 
j + 
k
D. 
i - 
j + 
k
Answer: B
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One model for expenditures at high schools gives the cost C, in dollars per pupil, as a function of the number n of students enrolled. The relationship is
.
?
Find the enrollment and cost that correspond to the minimum cost per pupil. Round your answers to the nearest whole number.
A. An enrollment of 1909 gives a minimum cost of $340 per pupil. B. An enrollment of 340 gives a minimum cost of $1909 per pupil. C. An enrollment of 1911 gives a minimum cost of $344 per pupil. D. An enrollment of 344 gives a minimum cost of $1911 per pupil.
Multiply. Express the product in lowest terms.
? 
A. 
B. 
C. 
D. 
Find the real solutions, if any, of the equation. Use the quadratic formula.49x2 - 12 = 28x
A. {- 
, 
}
B. {
, - 
}
C. {
, - 
}
D. {- 
, - 
}
Divide.
÷ 
A. 
B. 
C. 
D. 