Answer:
Center and radius of the circle of the equation
center = ( 4,9) Radius = 1
Step-by-step explanation:
Given -
Equation of circle is 
The equation of circle is represented by

where a and b are center of circle and radius r
Comparing these equation
then a = 4 and b = 9 and r = 1
Answer:
The correct answer is "Investigating the mean of the sample is the same as investigating the sampling distribution of the mean"
Step-by-step explanation:
For sampling distribution of the mean, if the size of population is n, and its mean is μ and the population standard deviation is σ, then the mean of all sample means also becomes equal to the population mean μ but for that the samples are taken randomly from the given population
In vertex form it will look like this
y = −5 (x+0) 2 + 15