Answer:
74
Step-by-step explanation:
74 divided by 2 is 37. 37 minus 10 is 27
1/8÷1/2
You flip the second one and change it to multiplication:
1/8×2/1=2/8
2/8 can be simplified by dividing both sides by 2:
1/4
Hope this helps :)
Answer:
80
Step-by-step explanation:
500 to 900? = 80.
Answer:
a) 
With:


b) 

c) 

d) 


Step-by-step explanation:
For this case we know the following propoertis for the random variable X

We select a sample size of n = 81
Part a
Since the sample size is large enough we can use the central limit distribution and the distribution for the sampel mean on this case would be:

With:


Part b
We want this probability:

We can use the z score formula given by:

And if we find the z score for 89 we got:


Part c

We can use the z score formula given by:

And if we find the z score for 75.65 we got:


Part d
We want this probability:

We find the z scores:



Answer:
1/2
Step-by-step explanation: