The solutions of the equation x^3+27i=0 are:

Part a : solve -vp + 40 < 65 for v part b : solve 7w - 3r = 15 for r show your work .

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?

Ineed me i stuck and i don’t want to get it wrong