!HELP! Which expression is equivalent to the given expression? (10c^6 d^-5) (2c^-5 d^4)

Regular price is $77.00 and the discount is 5% find the sale price

Okay so i didn't get this problem petro bought 8 tickets to a basketball game he paid a total of $200 write an equation to determine whether each ticket cost $26 or $28 so i didn't get this question so yeahyou have a good day.

Celeste wants to have her hair cut and permed and also go to lunch. she knows she will need $50. the perm cost twice as much as her haircut and she needs $5 for lunch. how much does the perm cost?