Please help! I’m not good at this

Farnesene is a sesquiterpene. how many different isomers arising from double-bond isomerizations are possible? g

What is the missing step in this proof ?

The annual snowfall in a town has a mean of 38 inches and a standard deviation of 10 inches. last year there were 63 inches of snow. find the number of standard deviations from the mean that is, rounded to two decimal places. 0.44 standard deviations below the mean 2.50 standard deviations below the mean 0.44 standard deviations above the mean 2.50 standard deviations above the mean