The standard form of the equation of a line:

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r-12
substitute in r=7
so 7-12 = -5
So do 50 times 12 is 600. So all you have to do is divide 144 by 600 which is .24 so she already swam 24%
Answer:
x=45
Step-by-step explanation:
this should be right
To find the area of the circle, you will use the formula for finding area of any circle.
The radius is half the diameter.
A = pi x r^2
3.14 x 13^2
A = 530.66 square units
The area is 530.66 square units.