There are 5+4 = <<5+4=9>>9 non-fiction books on the cart.
There are 2*5 = <<2*5=10>>10 autobiographies on the cart.
There are 5+9+10 = <<5+9+10=24>>24 fiction, non-fiction, and autobiography books on the cart.
There are 35-24 = <<35-24=11>>11 picture books on the cart.
#### 11