An investment of $1 is put in an account. Every 7 years, the money doubles. No additional money was added...

An investment of $1 is put in an account. Every 7 years, the money doubles. No additional money was added to the account. Would the expression 1 x 2 x 2 x 2 x 2 x 2 x 2 x 2 correctly represent how much was in the investment account after 42 years? Explain.
since 42 ÷ 7 = [ ] the account doubled [ ] times. The product doubles [ ] times in the expression.