Khan Academy is a good website and also has an app
Page orientation is the answer and can you please help me with my java questions
Answer:
Biodegradable means it SHOULD be safe for the environment. Meaning it can break down into natural elements. However, this is uncertain as some materials don't break down as easily, with a possibility of not having much of a difference as non-biodegradable materials. It all depends on the product, but if we're going by the label, then by definition it's environmentally safe.
Answer:
Push Z
Push Y
Pop Y
Push X
Pop X
Push W
Push V
Pop V
Push U
Pop U
Pop W
Pop Z
Push T
Push S
Pop S
Push R
Pop R
Pop T
Explanation:
A stack is a term in computer science that defines an abstract data type that acts as a collection of elements. It has two operations which are mainly push and pop.
Push is used in adding elements to the collection, while pop is used in removing elements from the collection.
If the element A has been pushed to the stack, you check if the top element in the pop[] sequence is A or not.
If it is A, you then pop it right, else top of the push[] sequence will be changed and make the sequences invalid.
So, similarly do the same for all the elements and check if the stack is empty or not in the last.
If empty you then print True else print False.