B.Com

Yes, you can apply.

Yes, you can apply for CAT, MAT, XAT and other MBA entrance exams after completing B.Com.

After completing B.Com, you can pursue an MBA in marketing, retail management, finance, human resource management, IT, banking, insurance, logistics and supply chain management, international business and operations management.
You can also opt for a professional course like CA. The Institute of Char

Some courses are:
Chartered Accountant (CA)
Masters of Commerce (M.Com)
Masters of Business Administration (MBA in Finance)
Certified Management Accountant (CMA)
Certified Public Accounting (CPA)
Association of Chartered Certified Accountants (ACCA)
Business Accounting and Taxation (BAT)

Some courses are:
Chartered Accountant (CA)
Masters of Commerce (M.Com)
Masters of Business Administration (MBA in Finance)
Certified Management Accountant (CMA)
Certified Public Accounting (CPA)
Association of Chartered Certified Accountants (ACCA)
Business Accounting and Taxation (BAT)

The general eligibility criterion for an air hostess in a majority of airlines is as follows:
(a) 10+2 pass from a recognized board of education. Some airlines prefer graduates.
(b) Age of candidate should be between 18 to 25 years
(c) Min. height required is 157.5 cm and weight should be in proportio

I would suggest you to choose a field in which you want to make a career. You can select the best companies and try for a job.

Yes, you can do that. Mathematics is not required.