human
If 1 pound of grapes costs $3, and the price per pound fluctuates based on the total weight of grapes purchased (with a 5% discount for every additional pound), how much will 4 pounds of grapes cost?
gpt
Step 1: Calculate the price of the first pound of grapes.
The first pound of grapes costs $3.

Step 2: Calculate the price of the second pound of grapes.
The second pound of grapes has a 5% discount, so we need to find 5% of $3.
5% of $3 = 0.05 * $3 = $0.15

Now, subtract the discount from the original price to find the price of the second pound.
$3 - $0.15 = $2.85

Step 3: Calculate the price of the third pound of grapes.
The third pound of grapes has a 10% discount (5% for each additional pound), so we need to find 10% of $3.
10% of $3 = 0.10 * $3 = $0.30

Now, subtract the discount from the original price to find the price of the third pound.
$3 - $0.30 = $2.70

Step 4: Calculate the price of the fourth pound of grapes.
The fourth pound of grapes has a 15% discount (5% for each additional pound), so we need to find 15% of $3.
15% of $3 = 0.15 * $3 = $0.45

Now, subtract the discount from the original price to find the price of the fourth pound.
$3 - $0.45 = $2.55

Step 5: Add the prices of all four pounds of grapes.
$3 + $2.85 + $2.70 + $2.55 = $11.10

So, 4 pounds of grapes will cost $11.10.