Disposing of something with the name of Allah Ta'ala

Q: 

1. Is it permissible to dispose of something with the name of Allah Ta'ala written inside of it, if the writing is covered? 

For example, a copy has random pages where the name of Allah Ta'ala is written, but these writings are covered by other pages and covers of the copy. 

2. If not, then is one required to check every copy and mark over them so it cannot be seen? 

3. What other writings does one have to cut off (or just cover) before disposing?

Husband asking the wife to pay towards purchasing the child's nappies

Q: My son is 3 years 5 months. My husband is telling me to potty train for few months. I am not training him due to the fact that I trained my first one at this age and he messed napaak everywhere.  I told my husband I will try this month to train him and he told me if his not trained then I will have to pay a portion for his nappies. I feel very hurt as he buys vape and uses which is a high expense too. I want to know is this Islamically correct for him to tell me that I should contribute?

Using the name of Hazrat Khadeejah (radhiyallahu anha) to promote feminism

Q: In regards to the fitna of feminism arising, many of our Muslim women have fallen for this wherein if you try to advise them that university and offices is not a place for a Muslim woman, their argument is that Hazrat Khadeejah (radhiyallahu anha) was a businesswoman. My question is: 

I find that using Hazrat Khadeejah (radhiyallahu anha) as an example of why they want to work in the corporate sector by saying that she was a businesswoman, etc. is very disrespectful towards the mother of the Muslim women. How do I explain to them that using the Sahaabiyyaat as examples is very disrespectful?