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# ive done these all at least twice and got a different answer each time, can someone show me how to do these with all the steps

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a) Find the balance of the investment if \$1000 is compounded annually, at 5%/a, for 20 years.

b). Tiffany deposits \$9000 in an account that pays 10%/a, compounded quarterly. After three years, the interest rate changes to 9%/a, compounded semi-annually. Calculate the value of her investment two years after this change.

c). On the day Sarah was born, her grandparents deposited \$500 in a savings account that earns 4.8%/a, compounded monthly. They deposited the same amount on her 5th, 10th and 15th birthdays. Determine the balance in the account on Sarah’s 18th birthday.

Feb 13, 2021

### Best Answer

#1
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a)  1000(1 + .05) 20

b)  9000 ( 1 + .1/4)12  = ..........     use this value in the second part

value * (1 + .09/2)4 =  final amount

c )  this is really  four results that you add together

500 ( 1 + .048/12)12*18    +

500 ( 1 + .048/12)13*12    +

500 (1 + .048/12)8*12        +

500 ( 1+ .048/12)3*12   =   total amount when 18 y/o

Feb 13, 2021

### 1+0 Answers

#1
+2
Best Answer

a)  1000(1 + .05) 20

b)  9000 ( 1 + .1/4)12  = ..........     use this value in the second part

value * (1 + .09/2)4 =  final amount

c )  this is really  four results that you add together

500 ( 1 + .048/12)12*18    +

500 ( 1 + .048/12)13*12    +

500 (1 + .048/12)8*12        +

500 ( 1+ .048/12)3*12   =   total amount when 18 y/o

Guest Feb 13, 2021