Ruddy has x dollars in his account. He spends $34.56 to buy medicines for his grandmother. If the balance in his account is $265.34, what was the amount in his account before purchase?

$299.90

Step-by-step explanation:

Add the $34.56 back to the $265.34

The answer is third option. First thing: exponential functions have shape: c^x where c is some number. that means that second and forth option cannot be answer.

Second thing: we can also write exp functions as a*(c^x). for x=0, c^x = 1 which lets us with a*1 = a
Third option has a =500 which is why that is the answer.