If on one evening, instead of eating mosquitoes, your 20 bats ate a kind of moth that weighs one-tenth of a gram (it takes 10 to make one gram), and each bat ate 10 grams of food, how many moths would they eat?

Anew obstacle course is home to several new types of challenging obstacles. one such obstacle is traversing a 15-stair staircase. to make it more challenging, the stairs are not uniformly spaced. rather, the vertical space between consecutive stairs for the first 10 stairs is 113 feet and the vertical space for the last 5 stairs is 134 feet. what is the total vertical distance traveled ascending and descending the entire 15-stair staircase?