Answer:
Step-by-step explanation:
The confidence interval for population mean is given by :-
Given :
n=23, which is a small sample(n<30), so we use t-test.
Significance level:
Critical value :
Then , the confidence interval for population mean will be :-
Hence, the 95% confidence interval for the population mean is
Answer:
The correct option is D.
Step-by-step explanation:
In a linear function the rate of change is constant. It means either the function increase by a constant rate or function decrease by a constant rate.
In an exponential function the rate of change is not constant.
It is given that the population of bacteria increases by 30 every hour.
Since the population of bacteria increases by a constant rate therefore the population function is linear and it is defined as
Where P₀ is initial population and t is time in hours.
Therefore correct option is D.
Step-by-step explanation:
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- Set up an equation and solve for x :
⋆ [ Exterior angle is always equal to the sum of two non - adjacent interior angles ]
~Remove the unnecessary brackets
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~Add the like terms : 2x ° & 3x°
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~Move 4x to right hand side and change it's sign
~Similarly move 12 to left hand side and change it's sign
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- Now , Substituting the value of x in (4x+9)° [ Exterior angle ]
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