Find the probability.A student will take a 12-question "true or false" test. If he must guess on every question, what is the probability that he answers 11 questions correctly?
A. 
B. 
C. 
D. 
Answer: B
You might also like to view...
Find the exact value of the expression.
A. - 
B. - 
C. -2
D. -
Solve each problem.The cost of a computer system increases with increased processor speeds. The cost C of a system as a function of processor speed is estimated as 
where S is the processor speed in MHz. Find the processor speed for which cost is at a minimum.
A. 0.2 MHz B. 0.3 MHz C. 3.6 MHz D. 1.4 MHz
Form a polynomial whose zeros and degree are given. Use a leading coefficient of 1. Zeros: -1, 1, - 3; degree 3
A. f(x) = x3 - 3x2 + x - 3 B. f(x) = x3 + 3x2 - x - 3 C. f(x) = x3 + 3x2 + x + 3 D. f(x) = x3 - 3x2 - x + 3
Solve the problem.The amount of a radioactive substance present, in grams, at time t in months is given by the formula 
Find the number of grams present in 2 years. If necessary, round to three decimal places.
A. 4547.150 B. 21.538 C. 454.715 D. 215.381