What is the angle of elevation of a ramp with 1/12 slope

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

() at a farm, animals are fed bales of hay and buckets of gain.each bale of hay is in the shape of a rectangular prism.the base side lengths 2 feet and 3 feet,and the height is 5 feet. each bucket of grain is a cylinder with diameter of 3 feet. the height of the bucket is 5 feet as the height of bale. a. which is larger in area, the rectangular base of the bale or the circular base of the bucket? explain how you know b. which is larger in volume, the bale or the bucket? explain how you know

Abacteria population is tripling every hour. by what factor does the population change in 1/2 hour? select all that apply