1.) When there are 16 apple trees per acre, the average yield has been found to be 500 apples per tree. For each additional tree planted per acre, the yield per tree decreases by 19 apples per tree. How many additional trees per acre should be planted to maximize the yield? (Round your answer to the nearest whole number.) _______________additional trees per acre.

2.) Sketch a complete graph of the function. Label eachx-intercept and the coordinates of each local extremum; find intercepts and coordinates exactly when possible and otherwise approximate them. (If there is no answer, enter NONE in the answer box.)

f(x)= 0.25x^4 +2x^3 +4x^2

x-intercepts

x=_________ (smaller x-value)

x=__________

x=__________

x=__________(larger value)

local min:

(__________,__________) smaller value

(__________, _________) larger x-value

local max:

(_________,___________) smaller value

(_________, __________) larger value

show how graph should looks like?

3.)