A survey among freshman at a certain university revealed that the time spent studying the week before final exams was normally distributed with a mean of 25 hours and a standard deviation of 7 hours. What proportion of freshman students study less than 30 hours the week before final exams?

if you're trying to figure out how much each ounce cost it would be 0.20

cents each ounce

an = 22 + (n-1) *6

110 seats

step-by-step explanation:

an=a1+(n-1)(d)

a1 = 22   this is the first item in the sequence

d =6   this is how the sequence goes up

a)   an = 22 + (n-1) *6

b) a12 = 22 + (12-1) *6

    a12 = 22+11*6

  a12 = 22 +88

  a12 = 110