# Tutor profile: Mario T.

## Questions

### Subject: Calculus

By using the power rule, what is the derivative of x^2?

The power rule simply states to drop down the exponent and multiply it by the variable. In this case, it is 2. so you multiply 2 by x and then subtract 1 to the exponent which was 2. so your final answer should be 2x because 2-1 equal 1 which makes it a single x.

### Subject: Statistics

If you have a bag of marbles containing ten blue marbles, six green marbles, and 12 yellow marbles, what are the chances of you selecting at random a green marble?

First you have to add up all the marbles in the bag which is 28. Then you find how many green marbles are inside the bag which is 6. Then you divide how many green marbles there are by the total marbles then you would get the answer of 6/28.

### Subject: Algebra

Solve for x: 2x+10=16

To solve for x, you must put x by itself. The way that is done is simply subtracting 10 from 2x+10=16, therefore making it 2x=6. The next thing you do is dividing 2 on both sides to get rid of it on the x. this results in x=3. That would be your answer.

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