4. Is 62500 millimeters, 8. is 16/24 because you could just cross multiply. Put 2/3 = x/24 and multiply 24 by 2 and 3 by x. Now the equation looks like 3x=48. make x be alone by dividing both sides by 3 and x=16. So your answer is 16/24. 10. is 3.3 centimeters
