Afamily has 4 children. find the probability that at least one child is a girl

Evaluate the expression. (9 + 5)(3 + 2)0

12 out of 30 people chose their favourite colour as blue caculate the angle you would use for blue on a pie chart

The bottom of ignacio's desktop is 74.5cm from the floor. ignacio's 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