Darell bought 3.78 ounces of chocolate. 0.9 ounces of it was milk chocolate and the rest was dark chocolate. How much dark chocolate did Darell buy?

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?