Mr. nguyen plants 24 trees around the neighborhood pond. he plants equal numbers of maple, pine, spruce, and birch trees. ge waters the spruce and birch trees before it gets dark. how many trees dose mr. nguyen still need to water? draw and label a tape diagram

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 believe the answer is c.