Answer:
{58.02007 , 61.97993]
Step-by-step explanation:
Data are given in the question
Sample of cars = n = 121
Average speed = sample mean = 60
Standard deviation = sd = 11
And we assume
95% confidence t-score = 1.97993
Therefore
Confidence interval is
![= [60 - \frac{1.97993 \times 11}{\sqrt{121} }] , [60 + \frac{1.97993 \times 11}{\sqrt{121} }]](https://tex.z-dn.net/?f=%3D%20%5B60%20-%20%20%5Cfrac%7B1.97993%20%5Ctimes%2011%7D%7B%5Csqrt%7B121%7D%20%7D%5D%20%2C%20%20%5B60%20%2B%20%20%5Cfrac%7B1.97993%20%5Ctimes%2011%7D%7B%5Csqrt%7B121%7D%20%7D%5D)
= {58.02007 , 61.97993]
Basically we applied the above formula to determine the confidence interval
Answer:
25 in
Step-by-step explanation:
The diameter is shown to be 10/4 times the height, so the diameter of the smaller solid is ...
(10/4)×(10 in) = (100/4) in = 25 in
Answer:
100/12
They will each have 8 ounces.
Step-by-step explanation:
Answer:
1 - 5i
Step-by-step explanation:
(-2 + 4i) + ( 3 -9i) = -2 + 4i + 3 - 9i
= -2 + 3 + 4i - 9i
= 1 - 5i