Number 12 and 17 help plz!

Answer:
12. 1.5
17. 4
Step-by-step explanation:
I really don't know how to explain it, but that halfway point between .1 and .2 is 1.5.
For 17,the hundredths place is the second digit after the decimal, so for 3.241, the second digit after the decimal is the four.