In one u. s. city, the taxi cost is $3 plus $0.50 per mile. if you are traveling from the airport, there is an additional charge of $4.00 for tolls. how far can you travel from the airport by taxi for $19.50?

This is different from the first one can someone me

At the olympic games, many events have several rounds of competition. one of these events is the men's 100-meter backstroke. the upper dot plot shows the times (in seconds) of the top 8 finishers in the final round of the 2012 olympics. the lower dot plot shows the times of the same 8 swimmers, but in the semifinal round. which pieces of information can be gathered from these dot plots? (remember that lower swim times are faster.) choose all answers that apply: a: the swimmers had faster times on average in the final round. b: the times in the final round vary noticeably more than the times in the semifinal round. c: none of the above.

Can someone me out here number 4 plz