Amother earned $ 18750.00 18750.00 from royalties on her cookbook. she set aside 20% of this for a down payment on a new home. the balance will be used for her son's future education. she invests a portion of the money in a bank certificate of deposit (cd account) that earns 4% and the remainder in a savings bond that earns 7%. if the total interest earned after one year is $ 900.00 900.00, how much money was invested at each rate? how much money was invested in the cd account? $ nothing (round to the nearest cent.)

a) $ 5000, $ 10000 b) $ 5000

Explanation:

The royalties money = $18750

She set aside 20% for new home  which = 0.2 × 18750 = $ 3750

Amount remaining = 18750 - 3750 = $15000

She invested a sum in a bank certificate of deposit

let the amount invested in bank certificate = y

profit from the investment in the bank = 0.04y

second investment amount = 15000 - y

profit of investment = 0.07 ( 15000 - y)

sum of the two profit  = 0.04y + 0.07 (15000 - y) = total profit = $ 900

0.04y + 0.07 (15000 - y) = 900

open the bracket and rearrange the equation

0.04y + 1050 - 0.07y = 900

0.04y - 0.07y = 900 - 1050

-0.03y = -150

divide both side by -0.03

y = -150 / -0.03 = $ 5000

The amount of money invest at 4% is $5000

The amount of money invested at 7% = 15000 - 5000 = $10000

The amount of money invested in CD account = $ 5000

answer; ///(d); determining who competes most closely   with whom evaluating whether industry driving forces and competitive pressure favor some strategic groups and hurt others, and ascertaining whether the profit potential of different strategic groups varies due to the strengths and weaknesses in each groups respective market positions;