Question

1. Suppose you have 16 tubes of paint. How many distinct color groupings can you make...

1. Suppose you have 16 tubes of paint. How many distinct color groupings can you make with your paint?

2. You deposit $3000 each year into an account earning 6% interest compounded annually. How much will you have in the account in 20 years?

3. Suppose you want to have $300,000 for retirement in 25 years. Your account earns 4% interest. How much would you need to deposit in the account each month?

Homework Answers

Answer #1

Question 1:

Total tubes of paint = n = 16

Distint colors available = 16

Distint color groupings can make with paint = 2n

= 216

= 65,536

Therefore, distinct color groupings can make with paint is 65,536

Question 2:

Annual Deposit = P = $3,000

n = 20 years

r = interest rate = 6%

Future value of annuity = P[(1+r)^n - 1] / r

= $3,000 [(1+6%)^20 - 1] / 6%

= $3,000 * 2.20713547 / 0.06

= $110,356.774

Therefore, Account balance in 20 years is $110,356.77

Question 3:

Let Monthly Deposit = P

n = 25*12  = 300 months

r = interest rate = 4%/12 = 0.333333%

Future value of annuity = P[(1+r)^n - 1] / r

$300,000 = P[(1+0.333333%)^300 - 1] / 0.333333%

$1,000 = P* 1.71376245

P = $583.511

Therefore, Monthly deposit to have $300,0000 in 25 years is $583.51

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