Answer:
the experimental probability is 1/5
Step-by-step explanation:
This is because one to calculate the experimental probability one has to divide the favorable events over the possible events, and those that Talia did were the favorable events divided the non-favorable events
20 heads and 80 tails
Faborable events = 20
Possible events = 20 + 80 = 100
20/100 = 1/5
Answer:
73.90%
Step-by-step explanation:
Let Event D=Defective, D' = Non Defective
Let Event N=New Machine, N' = Old Machine
From the given information:
We are required to calculate the probability that a widget was manufactured by the new machine given that it is non defective.
i.e. 
Using Baye's Law of conditional Probability
Therefore given that a selected widget is non-defective, the probability that it was manufactured by the new machine is 73.9%.
x^2 - 4
------------------------------
x + 7 | x^3 + 7x^2 - 4x - 28
x^3 + 7x^2
------------------
0 - 4x - 28
-4x - 28
-------------
0
Now we know that
x^3 + 7x^2 - 4x - 28 = (x^2 - 4)(x + 7)
x^2 - 4 can be factored since it is the difference of two squares.
x^2 - 4 = (x + 2)(x - 2)
The complete factoring is:
x^3 + 7x^2 - 4x - 28 = (x +2)(x - 2)(x + 7)
I say 3 if I’m wrong sorry
