Answer:
c) (9.08, 9.92)
Step-by-step explanation:
The formula for Confidence interval =
Mean ± z + Standard deviation/√n
Mean = 9.5 minutes
Standard deviation = 1.5 minutes
n = random number of samples = 49
z = z score of 95% confidence interval = 1.96
Confidence interval = 9.5 ± 1.96 × 1.5/√49
Confidence interval = 9.5 ± 1.96 × 1.5/7
= 9.5 ± 0.420
Hence,
9.5 - 0.42
= 9.08
9.5 + 0.42
= 9.92
Therefore, the confidence interval =(9.08, 9.92). Hence, Option C is correct.
Step-by-step explanation:
a vertex is a corner and the corner that both the quadrilateral and Pentagon share is a point at (-3, -5)
The answer is 13,940....
.......
It would be C.
In the second triangle if you add the angles 58+33 to angle C 88, you get 179, not 180. So the triangle dont share the same angles meaning they arent congruent.
3 pieces times 20 degrees equals 60 degrees <span />
