It depends on what r is and on what information you have.
Even if r is a radius of a circular shape, you would have different formulae depending on whether:
it is a sphere and you have the volume,
it is a sphere and you have the surface area,
it is a circle and you have the area,
it is a circle and you have the circumference,
it is a circle and you have the length and angle of an arc,
it is a cone and you have volume and height,
it is a cylinder and you have volume and height
etc.
n(1-R)L is an expression: it is not a formula.
When the radius is r and the center is at (a,b), the formula is (r*cos(θ) + a , r*sin(θ) +b). When the circle is rooted at (0,0), the formula is simply (r*cos(θ) , r*sin(θ)). This is the polar-coordinates system.
Area formula for circle= --,,- r 2
A=pi(r)2 r=radius
A = PI(r)^2
The formula for resistance (R) is R = E/I, where E is the voltage and I is the current flowing through the circuit.
use the formula 2(pi)r=16pi use the formula 2(pi)r=16pi use the formula 2(pi)r=16pi use the formula 2(pi)r=16pi use the formula 2(pi)r=16pi
use the formula 2(pi)r=16pi use the formula 2(pi)r=16pi use the formula 2(pi)r=16pi use the formula 2(pi)r=16pi use the formula 2(pi)r=16pi
R -coh-r
Formula: R-OH
n(1-R)L is an expression: it is not a formula.
When the radius is r and the center is at (a,b), the formula is (r*cos(θ) + a , r*sin(θ) +b). When the circle is rooted at (0,0), the formula is simply (r*cos(θ) , r*sin(θ)). This is the polar-coordinates system.
The formula for calculating the surface area of a sphere is 4πr², where r is the radius of the sphere. This formula represents the area covered by the curved surface of the sphere.
The chemical formula for acetal is usually R2C(OR')2, where R and R' represent alkyl or aryl groups.
Area formula for circle= --,,- r 2
R-SH
v=i*r