A farmer finds that if she plants 50 trees per acre, each tree will yield 65 bushels of fruit. She estimates that for each additional tree planted per acre, the yield of each tree will decrease by 2 bushels. How many trees should she plant per acre to maximize her harvest?

Which one ? is the answer and how to find this answer

Dakota earned $7.50 in interest in account a and $18.75 in interest in account b after 15 months. if the simple interest rate is 4% for account a and 5% for account b, which account has the greater principal? explain. to make it a little easier, there is an image. good luck!

What is the solution to the equation below? 3/x-2+6=square root x-2 +8