(–6s2 + 12s – 8) – (3s2 + 8s – 6) =
2 answers:
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Answer:
or
Step-by-step explanation:
The volume of a cylinder is calculated by the following formula
Where r is the radius of the cylinder and h is the height
In this case we know that the radius r of the base is:
and
So the Volume is:
Answer:
Option C
Step-by-step explanation:
Given that for a random sample of 20 houses selected from a city showed that the mean size of these houses is 1880 square feet with a standard deviation of 320 square feet.
X, the sizes of houses is Normal
Hence sample mean will be normal with
Mean = 1880
and std dev =
For 90% confidence interval critical value for t with degree of freedom 19 is
1.328
Confidence interval upper bound
= mean + margin of error
=
Option C is right