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 20%.
A. 0.89 min
B. 5.34 min
C. 2.35 min
D. 4.12 min
Answer: A
Mathematics
You might also like to view...
Find the angle between v and w. Round your answer to one decimal place, if necessary.v = 2i - 7j,
w = 8i - 9j
A. 35.7° B. 2.9° C. 12.9° D. 25.7°
Mathematics
Find z1z2. Write your answer in standard polar form with the argument in radians.z1 = 8
, z2 = 3
A. 24
B. 11
C. 24
D. 11
Mathematics
Divide, if possible. Write the answer in simplest form.
÷ 9
A. 
B. 5
C. 1
D. 
Mathematics
Find the values of x and y.
?
?
A. 
B. 
C. 
D. 
E. 
Mathematics