Can anyone please check my answers? And if there is any I didn't pick/wrong please let me know!! Thank you so much!

Evaluate-27 ^4/3/8 a) - 81/16 b) 81/16 c) 16/81

If myesha works overtime, she gets paid "time and a half" for every hour she works. in other words, for every hour over 40 hours myesha works each week, she gets her hourly pay plus half her hourly pay. what is myesha's pay per hour when she works overtime?

Devonte is balancing his checking account. his account statement does not include a deposit of $107.00 that he made on november 1st. what is devonte’s actual account balance?