What is the lcm (least common multiple) of 8, 9, and 10?

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

Annabelle's homework is 75% it took her three hours how long should she estimate it will take her to complete her homework.

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.