y= ( 10+0.5x)(2000-6x)

= -3x squared+940x+20000 (1≤ x ≤110, where x is an integer) 2 points.

(No points will be deducted if the value field is not written)

(2) Judging from the meaning of the question: -3x squared+940x+20000-10× 2000-340 = 22500 4 points.

Solve the equation: x 1 =50 x2 = 150 (irrelevant, omitted).

Li Jing wants to make a profit of 2250 yuan, so she needs to store these mushrooms for 50 days before selling them. 6 points

(2) Let the maximum profit be W, which is derived from the meaning of the question.

W= -3x squared+940x+20000-10x2000-340x.

=-3(x- 100) squared +30000.

When x= 100, w max =30000 8 points.

100 days < 1 10 days

Storage 100 days, the maximum profit can reach 30,000 yuan. 10 point.