# Help I'm a noob

#### fatron

##### New member

Just need a little help with x=18/(113-200E)
I am looking to find the coordinates of where the gradient is 1.

Cheers

#### Dr.Peterson

##### Elite Member
This is a duplicate. But here it is a little less obvious than in the other thread whether E is the independent variable, the dependent variable, or a constant. If that matters, mention it in the other thread.

Staff member

#### Subhotosh Khan

##### Super Moderator
Staff member
Where did they get 3.14

What is the equation for area of a circle? - it is given at the top of the paper

What is the radius of the circle? (diameter/2 = ?)

What is the value of $$\displaystyle \pi$$ ? = 3.14