Find the probability.A card is drawn from a deck of 52 cards. What is the probability that it is a numbered card (2-10) or a heart?
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Evaluate the work done between point 1 and point 2 for the conservative field F.F = 9 sin 9x cos 8y cos 4zi + 8 cos 9x sin 8y cos 4zj + 4 cos 9x cos 8y sin 4zk ; P1(0, 0, 0) , P2
A. W = 1 B. W = -2 C. W = 2 D. W = 0
Mathematics
All references are to the figure below. The distance between A and D is a, and the distance between D and C is x. 
Assuming that A = 29°, ?BDC = 52°, and a = 10, find h and x.
A. x ? 8, h ? 10 B. x ? 20, h ? 10 C. x ? 7.6, h ? 10. D. x ? 18, h ? 10.
Mathematics
Find the exact value of the expression.cos 40° cos 20° - sin 40° sin 20°
A. 
B. 
C. 
D. 
Mathematics
Simplify completely.
A. a - b
B. a - 2b + 1
C. 
D. 
Mathematics