Triangular Island has a lighthouse at each of its corners, represented by the vertices of the triangle. The perimeter of Triangular Island is 6.8 miles. There is a channel on Triangular Island which divides it into two smaller islands: Green Island and Coconut Island. The length of the channel is equal to half of the distance between the lighthouses on Coconut Island.
What is the perimeter of Green Island?

-7/8

step-by-step explanation:

instead of subtracting you add the -6/8 and -1/8

answer: 10 meter

step-by-step explanation:

need details

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