Plz answer 30 points logs

F(n + 1) = f(n) – 8. if f(1) = 100, what is f(6)?

Scores on the cognitive scale of the bayley-scales of infant and toddler development range from 1 to 19, with a standard deviation of 3. calculate the margin of error in estimating the true mean cognitive scale score, with 99% confidence, if there are 12 infants and toddlers in a sample.

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.