Answer:
Center (-13,11) , radius 3
Step-by-step explanation:
The given circle has equation
We compare this to the general equation.
where (-a,-b) is the center.
This implies that;
2a=26
2b=-22
b=-11
The center is therefore (-13,11)
The radius is given by
The radius is 3
Answer:
Claim is false
Step-by-step explanation:
Claim : A credit reporting agency claims that the mean credit card debt in a town is greater than $3500.
n = 20
Since n <30
So we will use t test
Formula :
s = standard deviation = 391
x = 3600
n = 20
Degree of freedom = n-1 = 20-1 = 19
α=0.10
So, using t table
= 1.72
t critical > t calculated
So we accept the null hypothesis
Hence we reject the claim that the mean credit card debt in a town is greater than $3500.