HELP 7-10 please

If sin(x) = 0 and cos(x) = 1, what is tan(x)?

In a young single person's monthly budget, $150 is spent on food, $175 is spent on housing, and $175 is spend on other items. suppose you drew a circle graph to represent this information, what percent of the graph represents housing?

Collin did the work to see if 10 is a solution to the equation r/4=2.4