PLEASE HELP WHICH ONES ARE PROPORTIONAL The formula to determine the diameter of a circle, d, is d=2r, where r is the radius. The radius of a circle is proportional to its diameter.

Nadia is baking muffins. Every 6 muffins require 1/3 cup of fruit. The number of muffins is proportional to the cups of fruit.

The volume of a cube is determined by the formula V=s3, where s is the side length. The volume of a cube is proportional to its side length.

sx chaaating please

answer: 204

step-by-step explanation:

we are told that the revenue is

x⋅(4080−10x)=−10x^2+4080x

this is a quadratic function, so to maximize it we should find the x-value of its vertex. recall that the x-value of the vertex of the parabola ax^2+bx+c is given by the formula −b/2a.

so in this case, we have a=−10 and b=4080, so the x-value of the vertex is

−b/2a= −(4080)/2(−10)=204

i think it will be zero as slope has a formula of difference between initial and final distance divided by itz time interval