Answer these questions Please show work

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?

Check all that apply. f is a function. f is a one-to-one function. c is a function. c is a one-to-one function.

Given sin28.4=.4756, cos28.4=.8796, and tan28.4=.5407 find the cos of 61.6