Calculus Please Help!

Question

Use your calculator to evaluate  . Give your answer to the nearest integer.

Answer 1

This problem can be solved in a calculator in different ways depending on which calculator you are using.

I used a TI-84 Plus calculator and these were the steps I took.

1. Press the "Math" button
2. In the first "Math" column, scroll down to number 9 or the "fnInt(" button.
3. Press Enter and your calculator should have spit out a blank canvas for writing your definite integral.
4. Fill out the parameters in the blank canvas just like the problem you were given. The top box is the "final number" and the bottom box is the "first number" that your integral is defined between. Make sure you put the equation you are taking the integral on in the box between the parentheses and make sure to define that you are looking for the "x" differential of your equation by placing an x in the very last box.
5. Since this integral is definite, you are looking for the area under the curve of the graph x² from 0 on the x-axis, to 2.
6. Once you press enter, you should find the Integral defined between those two points of x² to be 2.67 or 3, rounded to the nearest integer.

I hope this helped. Let me know if you are confused about anything else.