In a recent year a letter to europe from the united states costs .94 cents to mail. a letter mailed within the united states costs .44 cents. nancy mailed 5 letters for 3.70, some to europe and some to the united states. how many letters did she send to europe?

Technicians have installed a center pivot, circular irrigator for a farm that covers 25 acres. a.) how long is the irrigation boom (in feet) from the center pivot to its farthest extent? b.) if the irrigation boom makes 4 full revolutions in a day, how many miles does the end of the boom travel in 5 days?