Write a number with the digit 8 in the tens place

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

Using only the digits 5, 6, 7, 8, how many different three digit numbers can be formed if no digit is repeated in a number?

Write each improper fraction as a mixed number. 9/4. 8/3. 23/6. 11/2. 17/5. 15/8. 33/10. 29/12.