The simple interest formula is a = p(1 + r)t where p represents the amount originally deposited, r is the interest rate, and a is the amount in the account after t years.
find r if a = 2700, p = 2200 and t = 5.
2700 = 2200(1 + r)5
express r as a percentage to one decimal place (x. x%).

hi there!

first we need to find out how much they are adding to each number to make the next number.

ex: 4 + 4 = 8, 8 + 8 = 16, and so on.

so continuing with 32,

32 + 32 = 64

64 + 64 = 128

128 + 128 = 256

256 + 256 = 512

4, 8, 16, 32, 64, 128, 256, 512

the 8th term of the sequence will be 512

hope this ! ~

cross multiplying, we get :

⇒ (3) × (5) = (9) × (x)

⇒ 15 = 9x