Answer:
Yes. He spent 10 dollars.
Step-by-step explanation:
If he bought 10 apples, and he had 10 dollars, he would have no money left because each apple was 1 dollar.
hope this helps!
The antiderivative does not exist in elementary form.
These type of integrals can be approximated using numerical methods if limits are given.
If you want a more technical response, go to wolframalpha.
It depends what x is. If x was 100 then the difference would be 80.
