0.5 converted to a fraction

In a school 2/3 of the students study a language of those who study a language 2/5 study french

An objects motion is described by the equation d= 4sin (pi t) what will the height of the object be at 1.75 seconds?

65 8 7 4 5 6 8 4 3 2 1 9 5 6 4 2 1 6 5 1 5 1 3 2 3 5 multiply the third number in the first row by the seventh number in the third row. add this result to the fifth number in the second row. add to this total ten times the fourth number in the third row. subtract the eighth number in the first row from the result.