Answer the question.The numbers ? and ? + 
determine the points A and B, respectively, on the unit circle. How are the points A and B related?
A. B is the reflection of A about the x-axis.
B. B is the reflection of A through the origin.
C. B is the reflection of A about the y-axis.
D. The symmetry relationship between A and B cannot be determined without knowing the value of ?.
Answer: D
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Find the length and direction (when defined) of u × v.u = 4i + 6j , v = i - j
A. 2; -2k B. 2; 2k C. 10; -10k D. 10; -k
Solve the problem.A rare baseball card was sold in 1990 for $215,000. The card was then resold in 1998 for $491,000. Assume that the card's value increases exponentially, and find an exponential function V(t) that fits the data. (Round decimals to three places.)
A. V(t) = 215,000e0.775t, where t is the number of years after 1990. B. V(t) = 215e0.775t, where t is the number of years after 1990. C. V(t) = 215,000e0.103t, where t is the number of years after 1990. D. V(t) = 215e0.103t, where t is the number of years after 1990.
Solve the equation for exact solutions.cos-1 x = sin-1 
A. {0}
B. ?
C. 
D. 
Use a proportion to solve the problem.It takes 70 oz of grass seed to seed 3290 ft2 of lawn. At this rate, about how much would be needed for 
of lawn? Round to the nearest whole number.
A. 126 oz B. 128 oz C. 124 oz D. 282,000 oz