Answer: 
Step-by-step explanation:
As per given , we have
n = 11
Since population standard deviation is missing, so we use t-test.
Critical t-value for 99% confidence :
[using two-tailed t-value table]
Confidence interval :
Hence, 99% confidence interval for the mean amount of time that students spend in the shower each day.=
Answer:
−
24
x
−
12
h
+3
Step-by-step explanation:
8x-(12x^2+5x)
<em>difference</em>
<u>f
(
x
+
h
) and f
(
x
)
, and plug these values into the difference quotient formula</u>
−
24
x
−
12
h
+3
Answer:Graph C
Step-by-step explanation:
Answer:
A reflection over the line x=3
Step-by-step explanation:
Answer:
3 machine
Step-by-step explanation:
It is given that 6 machine each working at the same rate can complete the work in 12 days
We the has to complete in 8 days
Let we need x extra machine to complete the work in 8 days
So total number of machines =x+6
Now according to man work day equation 
x=3 machine
