Tiffany used her debit card to buy lunch for $9.72 on wednesday. on thursday, she deposited $9.72 back into her account. what is the overall increase or decrease in her bank account?

Which number produces a rationale number when multiplied by 1/5

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.

Anew shopping mall is gaining in popularity. every day since it opened, the number of shoppers is 5% more than the number of shoppers the day before. the total number of shoppers over the first 10 days is 1258 how many shoppers were on the first day?