Answer:
Therefore the required probability is 0.15.
Step-by-step explanation:
Poisson distribution:
The Poisson distribution is the number of an event is occur within a time period.

μ= The mean
x= event.
In Poisson distribution , the average rate event per time period is constant.
12% defective parts is produced by one of the machines of the time.
μ= (12%×7)= 0.84
x= the number of defective product =2

=0.15
Therefore the required probability is 0.15.
Answer:
512
Step-by-step explanation:
(a)=a*r^( n − 1)
(9)=2*(-2)^( 9− 1)
=512
hope this help
Answer:
An old bone contains 80% of its original carbon-14 in 1844.6479 years
Step-by-step explanation:
We know that
half life time of C-14 is 5730 years
so, h=5730
now, we can use formula

we can plug back h
and we get

An old bone contains 80% of its original carbon-14
so,
P(t)=0.80Po
we can plug it and then we solve for t





So,
An old bone contains 80% of its original carbon-14 in 1844.6479 years
Answer:
Step-by-step explanation:
t(-7)= 3(-7)= -21
s(-21)= 2-(-21)= 2 + 21= 23