A number is made up of two digits. the sum of digits is 11, if the digits are interchanged, the original number is increased by 9. find the number

Mr. mann's science students were experimenting with speed. they set up a 1 meter (100 cm) track. the students used balls instead of cars. the balls were different sizes and made of different materials. four at a time, students rolled balls around the track to see which had the fastest and slowest speeds. some of their data are shown in the table. which ball will take the longest to complete one lap around the track?

Did cuneiform develop the language we use today

For an actor, keeping his mind on will ultimately his performance.