Answer:
(2x + 3)(x - 7)
Step-by-step explanation:
The difference between 90% and 72% is 18%
1/2 divided by 3 is 1/6.
So your answer is 1/6 pounds each person.
Answer:


And the best option would be:
D. (0.191 to 0.249)
Step-by-step explanation:
For this case we know that the mean is:

And the standard error is given by:

We want to construct a 68% confidence interval so then the significance level would be :
and
. The confidence interval is given by:

Now we can find the critical value using the normal standard distribution and we got looking for a quantile who accumulate 0.16 of the area on each tail and we got:

And replacing we got:


And the best option would be:
D. (0.191 to 0.249)
36 / 9 equals 4 so the problem is basically 10 + 4 which is 14.