L 11.6.3 Test (CST): Sampling and Confidence intervals WA
Question 15 of 25
A 90% confidence interval is found to be (120, 140). What is the margin of
error?
O A. 10
OB. 18
O C. 9
OD. 20
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u rich

step-by-step explanation:

30

step-by-step explanation:

times by times

you would have to sell 24 bracelets.

step-by-step explanation:

84/3.5 = 24

center (1,3) with radius 6

step-by-step explanation:

we must complete the square to find the center and radius of the circle.

first make sure the x and y squared terms have 1 as their coefficients. we also make sure x and y terms together.

we now create space between the x and y terms with parenthesis.

we complete the square by taking the middle terms -2x and the -6y - divide each and square them.

we add the squares to both sides.

simplify.

and write the quadratics in factored form.

the center is (h,k) or (1,3). the radius is the square root of 36 which is 6.