After sales tax, an $81 cell phone costs $84.24. What is the sales tax percentage?​

The zoo collects $9.60 for every 24 tickets sold. how much will be collected for 400 tickets?

3x = 729 solve for x plz . it's urgent. will mark

After reading 80% of her e-mails in her inbox, danette still has m unread e-mails. which of the following expressions could represent the number of e-mails danette had in her inbox before she started reading? choose 2 answers: (choice a) 5m (choice b) 1.8m (choice c) 80m (choice d) m/0.8 (choice e) m/1−0.8