Gtx014
17.07.2019 •
Mathematics
Arecent poll of 80 randomly selected californians showed that 38% ( = 0.38) believe they are doing all that they can to conserve water. the state government would like to know, within a 99% confidence level, the margin of error for this poll. (99% confidence level z*-score of 2.58) remember, the margin of error, e, can be determined using the formula e = z*√p(1-p) / n. to the nearest whole percent, the margin of error for the poll
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Ответ:
Ответ:
101.08 degrees to nearest hundredth.
Step-by-step explanation:
Use the Cosine Rule:-
25.7^2 = 10.7^2 + 21.4^2 - 2*10.7*21.4 * cos x where x is the required angle.
cos x = (25.7^2 - 10.7^2 - 21.4^2) / (-2*10.7*21,4)
= 88.04 / - 457.96
= -0.192244
x = 101.08 degrees