Answer:
250 sheets.
Explanation:
Let n represent number of sheets in the stack.
We have been given that a stack of sheets of tissue paper is about 2.5 inches high. Each sheet is about 0.01 inch thick. We are asked to find the number of sheets in the stack.
Thickness of n sheets would be
.
Now, we will equate thickness of n sheets with thickness of stack as:

Let us solve for n.


Therefore, there are 250 sheets in the stack.