Which is a recursive formula for this geometric sequence? -320, -80, -20, -5, . .

a- a^1=-320
a^n=(a^n-1)(0.25)

b- a^1=-320
a^n=(a^n-

c-a^1=0.25
a^n=(a^n-)

d-a^1=-320
a^n=(a^n-1)(4)

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

The graph shows the charges for a health club in a month. make a function table for the input-output values. writes an equation that can be used to find the total charge y for the number of x classes

Simplify (1/2)4th power a. (1/16) b.(1/8) c.(1/4)