The ages of commercial aircraft are normally distributed with a mean of 13.5 years and a standard deviation of 7.8309 years. What percentage of individual aircraft have ages between 10 years and 16 ​years? Assume that a random sample of 81aircraft is selected and the mean age of the sample is computed. What percentage of sample means have ages between 10 years and 16 ​years?

In the figure below, segment ac is congruent to segment ab: triangle abc with a segment joining vertex a to point d on side bc. side ab is congruent to side ac which statement is used to prove that angle abd is congruent to angle acd? segment ad bisects angle cab. triangle acd is similar to triangle abd. segment ad is congruent to segment ac. angle cab is congruent to angle cba.

Aiden buys two bags of chips at $1.09 each and a 20 ounce soda for $1.20 at the gas station.he knows that the state tax is 5.5. how much change will he receive from a $5 bill?

Julie goes to the sports store and spends $40.50 before tax. she buys a pair of shorts for $21.75 and 3 pairs of socks that each cost the same amount. how much does each pair of socks cost? $$