Hey guys i need some help :)
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The equation for surface area is: 
. To get r, you must use Pythagorean theorem. r is found to be 45. This means after you plug it in, you get about 13571.68
To solve this, you need to know slope-intercept form;
Where mx is the slope and b is the y-intercept form.
Now, looking at the values you have been provided, you can just plug them into the formula.
Where mx is the slope and b is the y-intercept form.
Now, looking at the values you have been provided, you can just plug them into the formula.