Carol spent 1/9 of an hour playing on her phone. That used up 1/9 of her battery. How long would she have to play on her phone to use the entire battery?

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?