Dso in year 6
for x=6
p(6)=6³+6²-2(6)+27
p(6)=216+36-12+27
p(6)=252+15
p(6)=267
in hundreds of dollars
time 100
267 times 100=26700
D is answer
B
the other options all have a set price, the answers in b could all change price from month to month
Not enough information to solve it, considering we don't know about the cover.
Answer:
(0.0706, 0.1294)
Step-by-step explanation:
Confidence interval of a proportion is:
CI = p ± CV × SE
where p is the proportion,
CV is the critical value (z score or t score),
and SE is the standard error.
The sample is large enough to estimate as normal. For 95% confidence level, CV = z = 1.96.
Standard error for a proportion is:
SE = √(pq/n)
SE = √(0.1 × 0.9 / 400)
SE = 0.015
The confidence interval is:
CI = 0.1 ± (1.96)(0.015)
CI = (0.0706, 0.1294)
Round as needed.
D would be the answer you are looking for
