What is the measure of ∠BFC?

(co 3) the times that customers spend in a book store are normally distributed with a mean of 39.5 minutes and a standard deviation of 9.4 minutes. a random sample of 25 customers has a mean of 36.1 minutes or less. would this outcome be considered unusual, so that the store should reconsider its displays? no, the probability of this outcome at 0.035, would be considered usual, so there is no problem yes, the probability of this outcome at 0.035, would be considered unusual, so the display should be redone no the probability of this outcome at 0.359 would be considered usual, so there is no problem yes, the probability of this outcome at 0.965 would be considered unusual, so the display should be redone

Starting with the fact that angles 1 and a are a linear pair and that angles b and 2 are also a linear pair, use two column proof to prove that consecutive interior angles a and b are supplementary

To the nearest tenth the value of x that satisfies 2x = −2x + 11 is