Which of the following functions is graphed below? O A. -
Sx? +3.x < 1
(x+6, al
B. -*
1x+6, 841
-
O C. y.
(x+3.x>1
{x+6, xs1
OD. -
2.3.*51
(x+6.x=1

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Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

Find the value. a. 0.003 b. 0.03 c. 0.3 d. 3