A circular railroad-crossing sign has a diameter of 30 inches. which measurements is the closest to the area of the sign in square inches?

A- 188.4 square inches
B- 286.6 square inches
C- 706.5 square inches
D- 94.2 square inches

i think it's ф or x=6,-6

step-by-step explanation:

-x^2=-36

x^2=-36

ф

or

if you mean by : -(x^2)=-36

it'll be: x^2=36

x=6,x=-6

hope it'll ! have a good day!

you for asking!

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

answer: you need to organize this better it does not make sense.

step-by-step explanation: ?

2

step-by-step explanation: