Brian invests $10,000 in an account earning 4% interest, compounded annually for 10 years. five years after brian's initial investment, chris invests $10,000 in an account earning 7% interest, compounded annually for 5 years. given that no additional deposits are made, compare the balances of the two accounts after the interest period ends for each account. (round to the nearest dollar)

Compound interest formula is  

Where P is the principal amount

r is the rate of interest

t is number of years

Brian invests $10,000 in an account earning 4% interest, compounded annually for 10 years

P = 10,000  , r= 4% = 0.04 , t =10

Plug in all the values

= 14,802.44

Chris invests $10,000 in an account earning 7% interest, compounded annually for 5 years.

P = 10,000  , r= 7% = 0.07 , t =5

Plug in all the values

= 14,025.52

Brian balance  after the interest period = $ 14,802.44

Chris balance  after the interest period = $ 14,025.52

Balance in Brian's account is more than Chris account

mr. flanders’ class sold 47 doughnuts and   mr. rodriquez’s class sold 38 cartons of milk

step-by-step explanation:

let x be the number of doughnuts sold by mr. flanders’ class and y be the number of cartons sold by mr. rodriquez’s class.

1. together, the classes sold 85 items, then

x+y=85.

2. both classes earn earned $104.49 for their school. if doughnuts were sold for $1.35 each, then x doughnuts costed $1.35x. if cartons of milk were sold for $1.08 each, then y cartons costed $1.08y. hence,

1.35x+1.08y=104.49.

3. solve the system of two equations: