I'm trying to solve a math problem that asks to to find the interest when it has been compounded continuously, although, the formula it gives me to solve it is not clear. It tells me to take the principle which is $60000 and multiply it by (italicized e) to the power of rate times interest which is 9 years at a 5% interest rate. Can someone explain what the italicized E is so that I can figure out this problem?