Please help me on this I will give points please help and if you don’t know the answer please don’t answer it thank you

This race was first held in 1953 on august 16th. every decade the race finishes with a festival. how many years is this?

Explain step-by-step how to simplify -5(2x – 3y + 6z – 10).

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?