Find the requested vector.w = 3i - 5j - kFind a vector orthogonal to both w and j + k.
A. -3i + 2j - 2k
B. 3i + 2j - 3k
C. 3i - 3j - 4k
D. -4i - 3j + 3k
Answer: D
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Find the exact value of the expression without using a calculator or table.sin-1 
A. 
B. 
C. 
D. 
Write each rate as a unit rate as a phrase, and determine which is a better buy.A 20-ounce bottle of pop costs $1.80. A 32-ounce bottle of pop costs $2.24.
A. 20-ounce bottle: $0.91 per ounce; 32-ounce bottle: $1.07 per ounce. The 20-ounce is the better buy. B. 20-ounce bottle: $0.07 per ounce; 32-ounce bottle: $0.09 per ounce. The 20-ounce is the better buy. C. 20-ounce bottle: $0.09 per ounce; 32-ounce bottle: $0.07 per ounce. The 32-ounce is the better buy. D. 20-ounce bottle: $0.20 per ounce; 32-ounce bottle: $0.07 per ounce. The 32-ounce is the better buy.
Simplify. Include the absolute value symbol if necessary. If the answer is not a real number, state so.
A. 49x2 B. not a real number C. 7x2 D. 18x2
Sketch the curve represented by the parametric equations and find its rectangular-coordinate equation. x = 2 cos²t, y = 2 sin²t
What will be an ideal response?