Someone please help me answer this about rectangle angles

what’s the angle of a and b

Determine the number of girls in a math class with 87 boys if there are 25 girls for every 75 boys

Your food costs are $5,500. your total food sales are $11,000. what percent of your food sales do the food costs represent?

Which question is not a good survey question? a.don't you agree that the financial crisis is essentially over? 63on average, how many hours do you sleep per day? c. what is your opinion of educational funding this year? d.are you happy with the availability of electronic products in your state?