Find the indicated cross product.v = i + 4j - 2k, w = -3i + 6j - kFind w × v.
A. -18i + 8j - 8k
B. -8i - 7j - 18k
C. 2i - 5j - 22k
D. 7i + 8j - 18k
Answer: B
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Solve the problem.Find the value of x so that the shaded figure is a gnomon to the white triangle.
A. 36 B. 24 C. 39 D. 26 E. none of these
Find the product. Simplify before performing the multiplication.
? 
A. 
B. 1
C. 0
D. 
Find all angles in degrees that satisfy the equation. Round approximate answers to the nearest tenth of a degree.sin 3? = 0.834
A. {
? = 11.2° + k120° or ? = 48.8° + k120°}
B. {
? = 56.5° + k360° or ? = 78.8° + k120°}
C. {
? = 18.8° + k120° or ? = 41.2° + k120°}
D. {
? = 11.2° + k120° or ? = 108.8° + k120°}
Solve the problem.A reflecting telescope contains a parabolic mirror. If the mirror is 16 inches across at its opening and is 2 feet deep, where will the light be concentrated?
A. 0.7 in. from the vertex B. 0.1 in. from the vertex C. 0.3 in. from the vertex D. 8 in. from the vertex