Help pleaseee I’m confused

The table shows the webster family’s monthly expenses for the first three months of the year. they are $2,687.44, $2,613.09, and $2,808.64. what is the average monthly expenditure for all expenses?

Atriangular field has sides of lengths 21, 39, and 41 yd. find the largest angle. (round your answer to the nearest degree.)

This summer the number of tourists in salem increased 4.5% from last years total of 426000. how many more tourists came to salem this summer