Help! Find the domain of the graph

If sec theta = 5/3 and the terminal point determined by theta is in quadrant 4, then

Acaterer charges $500 plus $30 per guest to cater a wedding. walt and traci don't want to spend more than $8000 on catering. write and solve an inequality in terms of the number of guests, g, that can be invited. a) 30g ? 8000; g ? 267 b) 500g < 8000; g < 16 c) 500 + 30g < 8000; g < 250 d) 500 + 30g ? 8000; g ? 250

Which radical expression is a rational number? a. √ 360 b. √ 644 c. √ 225 d. √ 122