Estimate the probability of an event (empirical probability). You toss two fair coins 20 times and obtain the following results for the number of tails.
Estimate the probability that when the two coins are tossed exactly one will be tails.
A. 
B. 
C. 
D. 
Answer: B
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Find T, N, and B for the given space curve.r(t) = (cosh t)i + (sinh t)j + k
A. T = - 
(tanh t sech t)i + 
j + 
(sech t)k; N = (-sech t)i - (tanh t)k; 
B. T = - 
(tanh t)i + 
j + 
(sech t)k; N = (-sech t)i - (sinh t)k ; 
C. T = 
(tanh t sech t)i + 
j + 
(sech t)k; N = (sech2 t)i - (sinh t)k; 
D. T = 
(tanh t)i + 
j + 
(sech t)k; N = (sech t)i - (tanh t)k; 
Graph the given functions on the same rectangular coordinate system. Describe how the graph of g is related to the graph of f.f(x) = x, g(x) = x - 4
A. g shifts the graph of f vertically up 4 units
B. g shifts the graph of f vertically down 4 units
C. g shifts the graph of f vertically down 4 units
D. g shifts the graph of f vertically up 4 units
Solve the problem.A car traveled 246 miles on a trip. During 48 miles of the trip, the car traveled through the city and had gas mileage that was 9 fewer miles per gallon than the gas mileage on the highway. If the total amount of gasoline used for the trip was 8 gallons, find the gas mileage of the car on the highway.
A. 33 miles per gallon B. 42 miles per gallon C. 15 miles per gallon D. 24 miles per gallon
Simplify the expression. i-6
A) i B) - 3i C) - i D) - 1 E) 1