¿Que piensan que sucederá en el proceso de la división entre 10, 100, 1000 etc? Ayúdenme plz

Which of the following system of equation is not equal to the system of equations is not equal to the system of equations shown below

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?

What is the value of x in the equation (2)3) (x+6)= -18 a. -36 b. -33 c. -24 d. -18