The answer is B because $5.12 was removed from the total she had
So percent means part out of 100
30%=30/100=3/10
'of' means mutliply
30% of 130 is birds
3/10 times 130=birds
390/10=birds
39=birds
there are 39 exhibits with birds
8-2/x ---------------------------------
$267.20 all I did was cross multiply
Answer:
The correct option is B) 0.0228
Step-by-step explanation:
Consider the provided information.
The manager of a grocery store has taken a random sample of 100 customers. The average length of time it took the customers in the sample to check out was 3.1 minutes. The population standard deviation is known to be 0.5 minute.
Thus, the value of n = 100,
and σ = 0.5
We want to test to determine whether or not the mean waiting time of all customers is significantly more than 3 minutes.
The null and alternative hypotheses are,
and
Compute the test statistic 



By using the table.
P value = P(Z>2) = 0.0228
Hence, the correct option is B) 0.0228