Answer:
Step-by-step explanation:
Answer:
I THINK THE FIRST ONE IS CORRECT
IM 80% SURE
Step-by-step explanation:
The mass of the solution is 190 g - 120 g = 70 g. Thus, it's density is 70 g / 50 mL = 1.4 g/mL.
<h2>
Answer with explanation:-</h2>
Let be the population mean.
By considering the given information , we have
, since the alternative hypothesis is right tailed , so the test is right tail test.
Given : Sample size : n=64, which is a large sample (n>30) so we use z-test.
Sample mean :
Then, Standard deviation :
Test statistic for population mean :-
i.e.
P-value =
Since the p-value is less than the significance level , so we reject the null hypothesis that mean we can accept the alternative hypothesis.
Thus , we conclude that the true mean concentration can exceeds 22 blops .
Answer:
D. The graph of g(x) is shifted 4 units right and 5 units down.