The following that are mathematical sentences are b,c
Answer:
-6
Step-by-step explanation:
x=-6
Answer:

Step-by-step explanation:
The Central Limit Theorem estabilishes that, for a random variable X, with mean
and standard deviation
, the sample means with size n of at least 30 can be approximated to a normal distribution with mean
and standard deviation 
In this problem, we have that:

So

Answer:
60%
Step-by-step explanation:
Convert the fraction to a decimal, then multiply by 100
.