The probability that exactly k successes occur when a binomial trial is repeated independently n times and the probability of success on any given trial p is
A. 1 - p.
B. 
pn-k (1 - p)k.
C. 
.
D. pk (1 - p) n-k.
E. none of these
Answer: E
Mathematics
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Solve the right triangle shown in the figure. Round lengths to one decimal place and express angles to the nearest tenth of a degree. 
a = 3.2 cm, b = 1.9 cm
A. A = 59.3°, B = 30.7°, c = 3.7 cm B. A = 54.8°, B = 35.2°, c = 3.7 cm C. A = 30.7°, B = 59.3°, c = 3.7 cm D. A = 36.4°, B = 53.6°, c = 5.1 cm
Mathematics
Find the domain of the composite function f ? g.f(x) = 
; g(x) = 6x + 24
A. {x 
B. {x 
C. {x 
D. {x 
Mathematics
Factor by grouping.ay + y - a - 1
A. (y + 1)(a + 1) B. (y - 1)(a + 1) C. (y + 1)(a - 1) D. (y - 1)(a - 1)
Mathematics
Solve and check.
+ 
= 
A. x = 4 B. x = -1 C. x = -4 D. x = 1
Mathematics