Solve the problem.Between 7:00 AM and 8:00 AM, trains arrive at a subway station at a rate of 15 trains per hour 
per minute). The following formula from statistics can be used to determine the probability that a train will arrive within t minutes of 7:00 AM. F(t) = 1 - e-0.25tDetermine how many minutes are needed for the probability to reach 90%.
A. 9.21 min
B. 4.53 min
C. 0.38 min
D. 2.97 min
Answer: A
Mathematics
You might also like to view...
Perform the indicated operation. Write the answer without exponents.
A. 20,000 B. 20,000,000 C. 200,000 D. 2,000,000
Mathematics
Use De Morgan's laws to write the negation of the statement.A day late and a dollar short.
A. Not a day late or not a dollar short. B. Not a day late and a dollar short. C. Not a day late and not a dollar short. D. A day late or not a dollar short.
Mathematics
Write the solution set to the inequality in interval notation.x ? -9
A. (-9, ?) B. (-?, -9) C. [-9, ?) D. (-?, -9]
Mathematics
Find the mean of the data presented in the given table of values.
(Round to the nearest tenth if necessary.)
A. 7.7 B. 9.2 C. 8.2 D. 6.2
Mathematics