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Answer:
30
Step-by-step explanation:
Answer:
The required confidence inteval = 94.9%.
Step-by-step explanation:
Confidence interval: Mean ± Margin of error
Given: A confidence interval for the true mean diameter of all oak trees in the neighbourhood is calculated to be (36.191, 42.969).
i.e. Mean + Margin of error = 42.969 (i)
Mean - Margin of error = 36.191 (ii)
Adding (i) and (ii), we get
Margin of error = 42.969-39.58 [from (i)]
= 3.389
Margin of error =
here n= 25
i.e.
Using excel function 1-TDIST.2T(2.054,24)
The required confidence inteval = 94.9%.
Answer:
6.3 cm by 6.3 cm by 12.6cm
Step-by-step explanation:
Volume of the box=
The minimal dimensions of a box always occur when the base is a square.
Surface Area of a cylinder=
Surface Area of the sides and bottom=
Surface Area for the top =
The material for the sides and bottom costs $0.05 per
The material for the top costs $0.15 per
Therefore Cost of the box
Recall:
The minimum value of C is at the point where the derivative is zero.
The dimensions that would minimize the cost are 6.3 cm by 6.3 cm by 12.6cm
As the fraction says, 1/3 (1 & 3). 1 over 3 is the exact same as 1 divided by 3, it is still one third of one.