Suppose that $68 comma 000 is invested at 3 and one half
% interest, compounded quarterly.
a) find the function for the amount to which the investment grows after t years.
b) graph the function.
c) find the amount of money in the account at tequals0, 3, 6, and 10 years.
d) when will the amount of money in the account reach $300 comma 000?
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step-by-step explanation:

see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -