Four research teams each used a different method to collect data on how fast a new iron skillet rusts. assume that they all agree on the sample size and the sample mean (in minutes). use the (confidence level; confidence interval) pairs below to select the team that has the smallest sample standard deviation.
a. confidence level: 95% ; confidence interval: 40 to 50
b. confidence level: 99.7% ; confidence interval: 42 to 48
c. confidence level: 95% ; confidence interval: 35 to 55
d. confidence level: 68% ; confidence interval: 44.5 to 45.5

pi x^2

step-by-step explanation:

pi times x squared

answer: 0.64

step-by-step explanation:

1/6

step-by-step explanation:

< xcy ≅ < xby

step-by-step explanation:

in δcax and δbax,

so, δcax ≅ δbax (side-angle-side or sas)

since δcax ≅ δbax, we can conclude < acx ≅ < abx

in δacy and δaby,

so, δacy ≅ δaby (side-angle-side or sas)

since δacy ≅ δaby, we can conclude < acy ≅ < aby

now,

< acy ≅ < aby

=> < acx + < xcy ≅ < abx + < xby

=> < acx + < xcy ≅ < acx + < xby   (since < acx ≅ < abx already proved above)

subtracting < acx from both sides, we get

< acx + < xcy -< acx ≅ < acx + < xby -< acx

cancelling out < acx and -< acx from both sides, we get

< xcy ≅ < xby (proved)