Which link between two elements could you remove from the relation so that it becomes a function? 1 and c or 3 and a 4 and d or 5 and d 2 and e or 4 and d 2 and b or 2 and e

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?

Can someone me out here number 4 plz

What is the measure of ac? 5 units 13 units 26 units 39 units 3x- 2b 6x + 9