A surveyor purchased a piece of land for $31,000 in 1980. The land was worth $35,000 in 1985. Use the data to determine an exponential equation that models the value, y, of the land x years after 1980. Use the equation to determine the value of the land in 2020.

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

the awnser is visionary

step-by-step explanation: