Which function is graphed below?
+
+
of(x) = cos(x)
f(x) = -cos(x)
• f(x) = sin(x)

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?

The graph shows the distance kerri drives on a trip. what is kerri's speed . a. 25 b.75 c.60 d.50

Combine like terms to make a simpler expression 3z+z