Aman buy 10 lemon on 20 and sell 8 lemon on 20 find his profit or loss percent

The problem with this problem is I can't tell how much money he has gained because I don't know how much the lemons are actually worth. If the lemons are worth 20 bucks for 10, then he made 4 bucks, but if they are actually worth 20 bucks for 8, then he made 5 bucks. (i believe everything i said is true but i could be wrong)

circumference divided by 3.141592654 then timesthe radius twice

step-by-step explanation:

circumference divided by 3.141592654 then timesthe radius twice

x² + 3x + 7 = 0       [ax² + bx + c]

a = 1

b = 3

c = 7

quadratic formula:

    (+/- is this ±)

plug in the numbers into the variables

your answer is a