Answer:
a) 0.1353
b) 0.3679
Step-by-step explanation:
Let's start by defining the random variable T.
T : ''The time (in hours) required to repair a machine''
T ~ exp (λ)
T ~ exp (1)
The probability density function for the exponential distribution is
(In the equation I replaced λ = L)

With L > 0 and x ≥ 0
In this exercise λ = 1 ⇒

For a)





For b)

The event (T ≥ 10 / T > 9) is equivalent to the event T ≥ 1 so they have the same probability of occur



Answer:
The statement is true
Step-by-step explanation:
The question is as following :
is divisible by 7 and 19, true or false?
The given expression is 
Take
as a common

So,
divided 7 = 
And
divided 19 = 
is divisible by 7 and 19 (<u>True</u>)
Valid because 3 x 3 is 9 :))
Answer:
yes
Step-by-step explanation:
if it ends at 430 he will have 30 min before his appoionment
Multiple the 2 numbers and you should get 0.594
Explanation is the pic