Give the domain and range of the relation.
A. Domain: {5, 13}; Range: {4, 7, 12}
B. Domain: {4, 7, 12}; Range: {5, 13}
C. Domain: {4, 5, 7}; Range: {12, 13}
D. None of the above
Answer: B
Mathematics
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The position vector of a particle is r(t). Find the requested vector.The acceleration at t = 
for r(t) = (10t - 5t3)i + 2tan(3t)j + e3tk
A. a
= - 
?i - 72j + 9e1/4?k
B. a
= - 
?i - 72j + 9k
C. a
= - 
?i + 72j + 9e1/4?k
D. a
= 
?i + 72j + 9e1/4?k
Mathematics
Multiply.-9(-10)
A. 90
B. 
C. -19
D. -90
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Find the exact value of the indicated trigonometric function of the angle ? in the figure. Rationalize the denominator where necessary.Find cos ?.
A. 
B. 
C. 
D. 
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Use a graphing calculator to estimate the solution set of the equation. Round to the nearest hundredth.2 - x = 5-x
A. {2.26} B. {1.66} C. {-0.59, 1.96} D. {3.26}
Mathematics