Which of the following equations could represent the account balance …

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A certain investment account offers a special interest rate for the first

4

months the account is open followed by a lower interest rate for the remainder of the time the account is open. Bennett opened one of these accounts with an original account balance of

\

700

an dd i d n o t mak e an y o t h er d e p os i t sor w i t h d r a w a l s .

m o n t h s a f t er B e nn e tt o p e n e d t h e a cco u n t, t h e ba l an ce ha d in cr e a se d b y

0.6\%

o f t h eor i g ina l ba l an ce .

m o n t h s a f t er B e nn e tt o p e n e d t h e a cco u n t, t h e ba l an ce ha d in cr e a se d b y ana dd i t i o na l

0.2\%

o f t h e ba l an ce a tt h ee n d o f t h e f i r s t

m o n t h s . E v er y

m o n t h s a f t er t h e f i r s t

m o n t h s, t h e ba l an ce ha d in cr e a se d b y ana dd i t i o na l

0.2\%

o f t h e ba l an ce

2$ months before.

Which of the following equations could represent the account balance

B (x)

, in dollars,

x

months after the account was opened, where

x \geq 4

B (x) = 704.20 (1.002)^{\frac{x - 4}{2}}

B (x) = 704.20 (1.002)^{\frac{x}{2} - 4}

B (x) = 704.20 (1.002)^{2 x - 8}

B (x) = 704.20 (1.002)^{2 x - 4}