The figure is a circle with center O. Given PQ=12cm. Find the length of PA.

Which statements regarding efg are true? check all that apply.

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

I'm confused on this could anyone me and show me what i need to do to solve it.