Answer:
(27.954, 30.046)
Yes
Step-by-step explanation:
Given that :
Mean (m) = 29
Standard deviation (σ) = 2.2
Sample size (n) = 17
Confidence interval (α) = 95%
Average age as claimed by the company = 28
Confidence interval formula :
Mean ± (Zcritical * σ/sqrt(n))
Zcritical at 95% = 1.96
(Zcritical * σ/sqrt(n)) = (1.96 * (2.2/sqrt(17)) = (1.96 * 0.5335783) = 1.0458136
Lower boundary = (29 - 1.0458136) = 27.954186
Upper boundary = (29 + 1.0458136) = 30.045813
(27.954, 30.046)
b. Does this result lend support to the car's company's claim?
Yes, it does, 28 falls in between the the calculated confidence interval.
Answer:
yes
Step-by-step explanation:
The answer is "are" because it adds 3 each time!!! =)
6y- 12x =24
6y= 24+12x
y=4+2x
Answer:
105
Step-by-step explanation:
To find the rate per minute, divide 75 by 5. This gives you 15. Then multiply it by 7 to find the total number of pages printed at this rate in 7 minutes
Hope this helps :)
First, you can factor out the -. You then get
.
It becomes clear that this is a difference of squares. So, you can factor this to be
![-(x-2i)(x+2i)](https://tex.z-dn.net/?f=-%28x-2i%29%28x%2B2i%29)
Plugging in the - into one of the two factors gives you
![(-x-2i)(x-2i)](https://tex.z-dn.net/?f=%28-x-2i%29%28x-2i%29)
Therefore, the answer is A.