please help me!!!

Question

The value of a home in 2015 was $400,000. Its value has been doubling each decade.

If v is the value of the home, in dollars, write an equation for v in terms of d, the number of decades since 2015.

Answer 1

v(d) = 400,000(2)^d, where d is the number of decades since 2015

Answer 2

value=p*(1+.1)^t

t=1yr=528,000

10 =12,449638.10

I'm thinking of a bank statement.