In a group of 30 students, what is the probablility that no two of those students will have the same birthday;

The bottom of ignacio's desktop is 74.5cm from the floor. ignacios sits in his adjustable chair, and the tops of his legs are 49.3cm from the floor. each clockwise rotation of the knob on the chair raises ignacio's legs by 4.8cm. write an inequality to determine the number of clockwise rotations, r, ignacio could make with the knob without his legs touching the desk.

Find two numbers if their ratio is 4: 7 and their difference is 123.

Tonya paid 10$ for a new dvd in this transaction money is aa• store of valueb• medium of exchangec•unit of account