13 Selim Bey, maaşının \( \frac{1}{5} \) 'inin yarısı lle dogàgaz faturasını, \( \frac{3}{10} \) 'ünün yarısı ile de elektrik faturasını odüyor. selim Bey'in maaşı 36000 TL olduğuna göre elektrik ve doğal gaz faturasını ödedikten sonr maaşından geriye kaç lira kalır? \( \begin{array}{llll}\text { A) } 18000 & \text { B) } 24000 & \text { C) } 27000 & \text { D) } 30000\end{array} \)

If \( 3^2 \) is calculated, what is the result?

If \( 3^2 \) is calculated, what is the result?

What percentage is 36 of 82 ?

With your teacher: The first term of a arithmetic sequence is 14 . The \( 7^{\text {th }} \) term is 50 . Find: (a) The common difference ' \( d \) '. (b) The rule for the sequence. The \( 6^{\text {th }} \) term of an arithmetic sequence is 123 . The \( 11^{\text {th }} \) term is 98 . Find; (a) The common difference ' \( d \) ' and first term ' \( a \) '. The rule for the sequence. (b) (c) \( 16^{\text {th }} \) term.

a. Find \( 80,6 \% \) of 110.