State the most specific name for each figure

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?

Sasha delivers newspapers to subscribers that live within a 4 block radius of her house. sasha's house is located at point (0, -1). points a, b, c, d, and e represent the houses of some of the subscribers to the newspaper. to which houses does sasha deliver newspapers?

Given sin28.4=.4756, cos28.4=.8796, and tan28.4=.5407 find the cot of 61.6