Lien has 3/4 of a pizza. she gives 1/2 of the pizza to a friend. what fraction of the pizza will be left?

Ineed with math stuff it involves graphs

During the election for class president, 40% of the students voted for kellen, and 60% of the students voted for robbie. 500 students voted in total. how many more students voted for robbie than for kellen? answer with work : )

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