Write and solve an equation to find the missing dimension of each figure. number 3 and 4

Keisha makes a large sandwich for a family picnic she takes 1/2 of them the sandwich to the picnic her family eats 3/8 of the whole sandwich what fraction of the whole sandwich does keisha bring back from the picnic

An animal shelter has 21 puppies. if the puppies are 28% of the total dogs and cat population how many dogs and cats are in the animal shelter

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