Two circles have the same radius. complete the description for whether the combined area of the two circles is the same as the area of a circle with twice the radius.

the combined area of two circles with the same radius is πr2. the area of a circle with twice the radius is πr2. the combined area of two circles is as the area of a circle with twice the radius.

1. Is 2 because your combining the area or circles

2. D (Diameter) because Diameter is the equivalent of 2 radius since the circles has the same radius it is correct

The combined area of two circles with the same radius is  2  πr². The area of a circle with twice the radius is  4  πr². The combined area of two circles is  not the same as the area of a circle with twice the radius.

step-by-step explanation:

what grade level is this? need to know so i can look in my old textbooks!

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