Given
Elena is planning to go camping for the weekend and has already spent $40 on supplies.
She goes to the store and buys more supplies.
To find which inequality represents d, the total amount in dollars that Elena spends on supplies.
Now,
Let d be the total amount in dollars that Elena spends on supplies.
Since Elena has already spent $40 on supplies and bought more supplies.
Then, the amount spent by Elena on supplies is,
Hence, the answer is a) d>40.