Question 876723
Use this formula: 


FV = P*( (1+i)^(n) - 1 )/i


where,


P = amount deposited per period
i = interest rate per period
n = number of periods



In this case,


P = 450
i = 0.075/4 = 0.01875
n = 4*17 = 68


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FV = P*( (1+i)^(n) - 1 )/i


FV = 450*( (1+0.01875)^(68) - 1 )/0.01875


FV = 60880.8110324299


FV = 60880.81



They will have <font color="red">$60,880.81</font> in the account 17 years later (assuming they keep up with every deposit)



See this article for more details:
<a href="http://www.investopedia.com/terms/f/future-value-annuity.asp">http://www.investopedia.com/terms/f/future-value-annuity.asp</a>