statistics

$160 and a standard deviation of $14. Fill in the blanks by applying the 68-95-99.7 rule. The middle 95% of her electric bills are between $ and $ 118, 202 O 21.2, 34.8 146, 174 132, 186 Question 8 2 pts The lifetimes of projector bulbs of a particular type are normally distributed with a mean of 470 hours and a standard deviation of 15 hours. Apply the 68-95-99.7 rule to answer what percentage of the bulbs has lifetimes that lie within 1 standard deviation of the mean on either side? O 99% 0 50% O 95%