Tyler and Katie started a lemonade stand to raise money. They donated 2/10 of their profits to their school library, 1/10 to the animal shelter, and 2/5 to the food bank. They saved the rest to buy materials for their next project. What fraction of their profits did Tyler and Katie donate to others?

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?