Suzhou is located on the coast of Taihu Lake and is rich in aquaculture resources. Uncle Li, an aquaculture farmer, is going to polyculture hairy crabs and river shrimps. He learned the following letters. Solution: (1)500 Newton

(2) Income per mu = 4×1400+20×160 = 8800.

The cost per mu = 4× (75+525)+20× (15+85)+500 = 4900.

Profit = 8800-4900 = 3900.

(3) If you want to borrow X yuan from the bank,

3900×25000+x4900-8%x≥35000

Solution: x≥2 1094 yuan

And because we want to rent 25000+2 10944900≈9.4 by integer.

∴ Rent 10 mu. You need a loan when renting 10 mu: 10×4900-25000=24000.

A: Uncle Li wants to rent 10 mu and borrow 24,000 yuan.