Step-by-step explanation:
1 hour she travels = 19 km
60 min = 1 hr
53 min = 1/60 * 53 hr = 53/60 hr
Now,
1 hr = 19 km
4 + 53/60 hrs = 19 * ( 4 + 53/60) km
She travels 92.78 km in 4 hrs and 53 minutes.
Answer:
0.0224 or 2.24%
Step-by-step explanation:
The probability that an intern uses drugs, given that the test is negative, is determined by the probability of false negative divided by the probability of a negative (true or false).
A false negative occurs when an intern who uses drugs (10%) takes the test and gets a negative. Since the test gets it right 80% of the time, the probability of this happening is:

A true negative occurs when an intern who does not use drugs (90%) takes the test and gets a negative. Since the test gets it wrong 3% of the time, the probability of this happening is:

Therefore, the probability that an intern uses drugs, given that the test is negative is:

The probability is 0.0224 or 2.24%.
4y is 55% of 7.27 i believe?