Solve the problem.Find a unit vector perpendicular to both 7i + 5k and 3k.
A. k
B. 21j
C. j
D. i
Answer: C
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Solve.An apartment complex has 8 apartment buildings. Each building has 6 floors with 3 apartments per floor. Find how many apartments are in this complex.
A. 17 apartments B. 144 apartments C. 134 apartments D. 154 apartments
Rewrite the equation in standard form. Determine whether the parabola is horizontal or vertical, the direction it opens, and the vertex.y = x2 - 4x + 11
A. y = (x + 2)2 - 7 vertical, opens upward, vertex (-2, -7) B. y = (x + 7)2 - 2 vertical, opens upward, vertex (-7, -2) C. y = (x - 2)2 + 7 vertical, opens upward, vertex (2, 7) D. y = (x - 7)2 + 2 vertical, opens upward, vertex (7, 2)
Determine whether the graph of the equation is symmetric with respect to the x-axis, the y-axis, and/or the origin.x2 + y - 49 = 0
A. origin B. y-axis C. x-axis D. x-axis, y-axis, origin E. none
Solve the problem.Given the following revenue and cost functions, determine for what x-values a loss will occur. (Recall that profit equals revenue minus cost.) R(x) = 60x - 2x2; C(x) = 20x + 941
A. For 5.0 < x < 15.0 B. For 2.7 < x < 17.3 C. For x < 5.0 or x > 15.0 D. For x < -17.3 or x > -2.7