Keith started saving for retirement at age 45 with plans to retire at age 70. he invested an average of $500 per month in various securities, with an average annual return of 6% adjusted for inflation. assuming monthly compounding, how much has keith saved at the start of retirement? (show work)

a= $27,432.26
b= $446,496.98
c= $346,496.98
d= $712,355.15

option a.

step-by-step explanation:

if you look closely at the graph, we can notice that the function is not defined at two different points.

if you look at functions b and c, you will notice that both functions are not defined at just one point. the function b is not defined at x= -5/2 and function c is not defined at x=-5. both options are discarded, given that our function should not be defined at two fiferent points.

now, if you look closely at the graph you will notice that the function sketched is not defined at x=5 and x=-2.

correct answer is b. 27/8

step-by-step explanation: