If 180°< a <270° and cos a = -8/17 , what is sin (-alpha)

Im gonna fail 7th grade selective breeding 1. creates offspring which are genetically identical to the parent 2. is the process of breeding only organisms with desirable traits 3. involves the removal of the nucleus of a cell 4. combines traits from organisms of different species

Credit card a offers an introductory apr of 3.4% for the first three months and standard apr of 15.7% thereafter,

An engineer scale model shows a building that is 3 inches tall. if the scale is 1 inch = 600 feet, how tall is the actual building?